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                                                                    EXHIBIT 10.6

                                HANOVER GUARANTEE

         HANOVER GUARANTEE, dated as of December 15, 2003, made by HANOVER
COMPRESSOR COMPANY (the "Guarantor"), in favor of JPMORGAN CHASE BANK, as (in
such capacity, the " ") for the lenders (the "Lenders") parties to the Credit
Agreement, dated as of December 15, 2003 (as may be amended, supplemented or
otherwise modified from time to time, the "Credit Agreement"), among the
Guarantor, Hanover Compression Limited Partnership, a Delaware limited
partnership ("HCLP"), the Lenders, Bank One, NA, as syndication agent and the
Administrative Agent.

                              W I T N E S S E T H:

         WHEREAS, pursuant to the Credit Agreement, the Lenders have severally
agreed to make Loans to HCLP upon the terms and subject to the conditions set
forth therein, to be evidenced by the Notes issued by HCLP under the Credit
Agreement;

         WHEREAS, it is a condition precedent to the obligation of the Lenders
to continue to make their respective Loans to HCLP under the Credit Agreement
that the Guarantor shall have executed and delivered this Guarantee to the
Administrative Agent for the ratable benefit of the Lenders.

         NOW, THEREFORE, in consideration of the premises and to induce the
Administrative Agent and the Lenders to enter into the Credit Agreement and to
induce the Lenders to make their respective loans to HCLP under the Credit
Agreement, the Guarantor hereby agrees with the Administrative Agent, for the
ratable benefit of the Lenders, as follows:

         1.       Defined Terms.    (a) Unless otherwise defined herein, terms
defined in the Credit Agreement and used herein shall have the meanings given to
them in the Credit Agreement.

         (b)      As used herein, "Obligations" means the collective reference
to the unpaid principal of and interest on the Notes and all other obligations
and liabilities of HCLP to the Administrative Agent or the Lenders (including,
without limitation, interest accruing at the then applicable rate provided in
the Credit Agreement after the maturity of the Loans and interest accruing at
the then applicable rate provided in the Credit Agreement after the filing of
any petition in bankruptcy, or the commencement of any insolvency,
reorganization or like proceeding, relating to HCLP, whether or not a claim for
post-filing or post-petition interest is allowed in such proceeding), whether
direct or indirect, absolute or contingent, due or to become due, now existing
or hereafter incurred, which may arise under, out of, or in connection with, the
Credit Agreement, the Notes, the Letters of Credit, the other Loan Documents or
any other document made, delivered or given in connection therewith, whether on
account of principal, interest, reimbursement obligations, fees, indemnities,
costs, expenses or otherwise (including, without limitation, all fees and
disbursements of counsel to the Administrative Agent or to the

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Lenders that are required to be paid by HCLP or the Guarantor pursuant to the
terms of the Credit Agreement or this Agreement or any other Loan Document).

         (c)      The words "hereof," "herein" and "hereunder" and words of
similar import when used in this Guarantee shall refer to this Guarantee as a
whole and not to any particular provision of this Guarantee, and section and
paragraph references are to this Guarantee unless otherwise specified.

         (d)      The meanings given to terms defined herein shall be equally
applicable to both the singular and plural forms of such terms.

         2.       Guarantee. (a) Subject to the provisions of paragraph
  2(b), the Guarantor hereby, unconditionally and irrevocably, guarantees to the
Administrative Agent, for the ratable benefit of the Lenders and their
respective successors, indorsees, transferees and assigns, the prompt and
complete payment and performance by HCLP when due (whether at the stated
maturity, by acceleration or otherwise) of the Obligations.

         (b)      Anything herein or in any other Loan Document to the contrary
notwithstanding, the maximum liability of the Guarantor hereunder and under the
other Loan Documents shall in no event exceed the amount which can be guaranteed
by the Guarantor under applicable federal and state laws relating to the
insolvency of debtors.

         (c)      The Guarantor further agrees to pay any and all expenses
(including, without limitation, all fees and disbursements of counsel) which may
be paid or incurred by the Administrative Agent or any Lender in enforcing, or
obtaining advice of counsel in respect of, any rights with respect to, or
collecting, any or all of the Obligations and/or enforcing any rights with
respect to, or collecting against, the Guarantor under this Guarantee. This
Guarantee shall remain in full force and effect until the Obligations are paid
in full and the Commitments are terminated, notwithstanding that from time to
time prior thereto HCLP may be free from any Obligations.

         (d)      The Guarantor agrees that the Obligations may at any time and
from time to time exceed the amount of the liability of the Guarantor hereunder
without impairing this Guarantee or affecting the rights and remedies of the
Administrative Agent or any Lender hereunder.

         (e)      No payment or payments made by HCLP, the Guarantor, any other
guarantor or any other Person or received or collected by the Administrative
Agent or any Lender from HCLP, the Guarantors, any other guarantor or any other
Person by virtue of any action or proceeding or any set-off or appropriation or
application at any time or from time to time in reduction of or in payment of
the Obligations shall be deemed to modify, reduce, release or otherwise affect
the liability of the Guarantor hereunder which shall, notwithstanding any such
payment or payments other than payments made by the Guarantor in respect of the
Obligations or payments received or collected from the Guarantor in respect of
the Obligations, remain liable for the Obligations up to the maximum liability
of the Guarantor hereunder until the Obligations are paid in full and the
Commitments are terminated.

         3.       Right of Set-off. Upon the occurrence and during the
continuance of any Event of Default, the Guarantor hereby irrevocably authorizes
each Lender at any time and from time to

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time without notice to such Guarantor, any such notice being expressly waived by
the Guarantor, to set-off and appropriate and apply any and all deposits
(general or special, time or demand, provisional or final), in any currency, and
any other credits, indebtedness or claims, in any currency, in each case whether
direct or indirect, absolute or contingent, matured or unmatured, at any time
held or owing by such Lender to or for the credit or the account of such
Guarantor, or any part thereof in such amounts as such Lender may elect, against
and on account of the obligations and liabilities of such Guarantor to such
Lender hereunder and claims of every nature and description of such Lender
against such Guarantor, in any currency, whether arising hereunder, under the
Credit Agreement, any Note, any Letter of Credit or any Loan Document, as such
Lender may elect, whether or not the Administrative Agent or any Lender has made
any demand for payment and although such obligations, liabilities and claims may
be contingent or unmatured. The Administrative Agent and each Lender shall
notify such Guarantor promptly of any such set-off and the application made by
the Administrative Agent or such Lender, provided that the failure to give such
notice shall not affect the validity of such set-off and application. The rights
of the Administrative Agent and each Lender under this Section are in addition
to other rights and remedies (including, without limitation, other rights of
set-off) which the Administrative Agent or such Lender may have.

         4.       No Subrogation. Notwithstanding any payment or payments made
by the Guarantor hereunder or any set-off or application of funds of the
Guarantor by any Lender, the Guarantor shall not be entitled to be subrogated to
any of the rights of the Administrative Agent or any Lender against HCLP or any
collateral security or guarantee or right of offset held by any Lender for the
payment of the Obligations, nor shall the Guarantor seek or be entitled to seek
any contribution or reimbursement from HCLP or any other guarantor in respect of
payments made by such Guarantor hereunder, until all amounts owing to the
Administrative Agent and the Lenders by HCLP on account of the Obligations are
paid in full and the Commitments are terminated. If any amount shall be paid to
the Guarantor on account of such subrogation rights at any time when all of the
Obligations shall not have been paid in full, such amount shall be held by such
Guarantor in trust for the Administrative Agent and the Lenders, segregated from
other funds of such Guarantor, and shall, forthwith upon receipt by such
Guarantor, be turned over to the Administrative Agent in the exact form received
by such Guarantor (duly indorsed by such Guarantor to the Administrative Agent,
if required), to be applied against the Obligations, whether matured or
unmatured, in such order as the Administrative Agent may determine.

         5.       Amendments, etc. with respect to the Obligations; Waiver of
Rights. The Guarantor shall remain obligated hereunder notwithstanding that,
without any reservation of rights against the Guarantor and without notice to or
further assent by the Guarantor, any demand for payment of any of the
Obligations made by the Administrative Agent or any Lender may be rescinded by
such party and any of the Obligations continued, and the Obligations, or the
liability of any other party upon or for any part thereof, or any collateral
security or guarantee therefor or right of offset with respect thereto, may,
from time to time, in whole or in part, be renewed, extended, amended, modified,
accelerated, compromised, waived, surrendered or released by the Administrative
Agent or any Lender, and the Credit Agreement, the Notes and the other Loan
Documents and any other documents executed and delivered in connection therewith
may be amended, modified, supplemented or terminated, in whole or in part, as
the Administrative Agent (or the Required Lenders, as the case may be) may deem
advisable from time to time, and any collateral security, guarantee or right of
offset at any time held by the Administrative Agent

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or any Lender for the payment of the Obligations may be sold, exchanged, waived,
surrendered or released. Neither the Administrative Agent nor any Lender shall
have any obligation to protect, secure, perfect or insure any Lien at any time
held by it as security for the Obligations or for this Guarantee or any property
subject thereto. When making any demand hereunder against the Guarantor, the
Administrative Agent or any Lender may, but shall be under no obligation to,
make a similar demand on HCLP or the Guarantor or guarantor, and any failure by
the Administrative Agent or any Lender to make any such demand or to collect any
payments from HCLP or any such other guarantor or any release of HCLP or such
other guarantor shall not relieve the Guarantor in respect of which a demand or
collection is not made or the Guarantor not so released of its several
obligations or liabilities hereunder, and shall not impair or affect the rights
and remedies, express or implied, or as a matter of law, of the Administrative
Agent or any Lender against the Guarantor. For the purposes hereof "demand"
shall include the commencement and continuance of any legal proceedings.

         6.       Guarantee Absolute and Unconditional. The Guarantor waives any
and all notice of the creation, renewal, extension or accrual of any of the
Obligations and notice of or proof of reliance by the Administrative Agent or
any Lender upon this Guarantee or acceptance of this Guarantee, the Obligations,
and any of them, shall conclusively be deemed to have been created, contracted
or incurred, or renewed, extended, amended or waived, in reliance upon this
Guarantee; and all dealings between HCLP and the Guarantor, on the one hand, and
the Administrative Agent and the Lenders, on the other hand, likewise shall be
conclusively presumed to have been had or consummated in reliance upon this
Guarantee. The Guarantor waives diligence, presentment, protest, demand for
payment and notice of default or nonpayment to or upon HCLP or the Guarantor
with respect to the Obligations. The Guarantor understands and agrees that this
Guarantee shall be construed as a continuing, absolute and unconditional
guarantee of payment without regard to (a) the validity, regularity or
enforceability of the Credit Agreement, any Note or any other Loan Document, any
of the Obligations or any other collateral security therefor or guarantee or
right of offset with respect thereto at any time or from time to time held by
the Administrative Agent or any Lender (b) any defense, set-off or counterclaim
(other than a defense of payment or performance) which may at any time be
available to or be asserted by HCLP against the Administrative Agent or any
Lender, or (c) any other circumstance whatsoever (with or without notice to or
knowledge of HCLP or such Guarantor) which constitutes, or might be construed to
constitute, an equitable or legal discharge of HCLP for the Obligations, or of
such Guarantor under this Guarantee, in bankruptcy or in any other instance.
When pursuing its rights and remedies hereunder against the Guarantor, the
Administrative Agent and any Lender may, but shall be under no obligation to,
pursue such rights and remedies as it may have against HCLP or any other Person
or against any collateral security or guarantee for the Obligations or any right
of offset with respect thereto, and any failure by the Administrative Agent or
any Lender to pursue such other rights or remedies or to collect any payments
from HCLP or any such other Person or to realize upon any such collateral
security or guarantee or to exercise any such right of offset, or any release of
HCLP or any such other Person or any such collateral security, guarantee or
right of offset, shall not relieve such Guarantor of any liability hereunder,
and shall not impair or affect the rights and remedies, whether express, implied
or available as a matter of law, of the Administrative Agent and the Lenders
against such Guarantor. This Guarantee shall remain in full force and effect and
be binding in accordance with and to the extent of its terms upon the Guarantor
and its successors and assigns, and shall inure to the benefit of the
Administrative Agent and the Lenders, and their

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respective successors, indorsees, transferees and assigns, until all the
Obligations and the obligations of the Guarantor under this Guarantee shall have
been satisfied by payment in full and the Commitments shall be terminated,
notwithstanding that from time to time during the term of the Credit Agreement
HCLP may be free from any Obligations.

         7.       Reinstatement. This Guarantee shall continue to be effective,
or be reinstated, as the case may be, if at any time payment, or any part
thereof, of any of the Obligations is rescinded or must otherwise be restored or
returned by the Administrative Agent or any Lender upon the insolvency,
bankruptcy, dissolution, liquidation or reorganization of HCLP or the Guarantor,
or upon or as a result of the appointment of a receiver, intervenor or
conservator of, or trustee or similar officer for, HCLP or the Guarantor or any
substantial part of its property, or otherwise, all as though such payments had
not been made.

         8.       Payments. The Guarantor hereby guarantees that payments
hereunder will be paid to the Administrative Agent without set-off or
counterclaim in U.S. Dollars at the office of the Administrative Agent located
at 270 Park Avenue, New York, New York 10017.

         9.       Representations and Warranties. The Guarantor hereby
represents and warrants that:

         (a)      it is a corporation duly organized, validly existing and in
good standing under the laws of the State of Delaware and has the corporate
power and authority and the legal right to own and operate its property, to
lease the property it operates and to conduct the business in which it is
currently engaged;

         (b)      it has the corporate power and authority and the legal right
to execute and deliver, and to perform its obligations under, this Guarantee,
and has taken all necessary corporate action to authorize its execution,
delivery and performance of this Guarantee;

         (c)      this Guarantee constitutes a legal, valid and binding
obligation of such Guarantor enforceable in accordance with its terms, except as
affected by bankruptcy, insolvency, fraudulent conveyance, reorganization,
moratorium and other similar laws relating to or affecting the enforcement of
creditors' rights generally, general equitable principles and an implied
covenant of good faith and fair dealing;

         (d)      the execution, delivery and performance of this Guarantee will
not violate any provision of any Requirement of Law or Contractual Obligation of
such Guarantor and will not result in or require the creation or imposition of
any Lien on any of the properties or revenues of such Guarantor pursuant to any
Requirement of Law or Contractual Obligation of the Guarantor;

         (e)      no consent or authorization of, filing with, or other act by
or in respect of, any arbitrator or Governmental Authority and no consent of any
other Person (including, without limitation, any stockholder or creditor of such
Guarantor) is required in connection with the execution, delivery, performance,
validity or enforceability of this Guarantee; and

         (f)      no litigation, investigation or proceeding of or before any
arbitrator or Governmental Authority is pending or, to the knowledge of such
Guarantor, threatened by or against such Guarantor or against any of its
properties or revenues with respect to this Guarantee or any of the transactions
contemplated hereby, which would reasonably be expected to have a material

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adverse effect on the business, operations, property or financial or other
condition of such Guarantor.

         10.      Authority of Administrative Agent. The Guarantor acknowledges
that the rights and responsibilities of the Administrative Agent under this
Guarantee with respect to any action taken by the Administrative Agent or the
exercise or non-exercise by the Administrative Agent of any option, right,
request, judgment or other right or remedy provided for herein or resulting or
arising out of this Guarantee shall, as between the Administrative Agent and the
Lenders, be governed by the Credit Agreement and by such other agreements with
respect thereto as may exist from time to time among them, but, as between the
Administrative Agent and such Guarantor, the Administrative Agent shall be
conclusively presumed to be acting as agent for the Lenders with full and valid
authority so to act or refrain from acting, and the Guarantor shall not be under
any obligation, or entitlement, to make any inquiry respecting such authority.

         11.      Notices. All notices, requests and demands to or upon the
Administrative Agent, any Lender or the Guarantor to be effective shall be in
writing (or by telex, fax or similar electronic transfer confirmed in writing)
and shall be deemed to have been duly given or made when delivered by hand or if
by overnight courier service, when received or if given by mail, when deposited
in the mails by certified mail, return receipt requested, or if by telex, fax or
similar electronic transfer, when sent and receipt has been confirmed, addressed
as follows:

         (a)      if to the Administrative Agent or any Lender, at its address
or transmission number for notices provided in subsection 11.2 of the Credit
Agreement; and

         (b)      if to the Guarantor, at its address or transmission number for
notices set forth under its signature below.

         The Administrative Agent, each Lender and the Guarantor may change its
address and transmission numbers for notices by notice in the manner provided in
this Section.

         12.      Counterparts. This Guarantee may be executed by the Guarantor
on any number of separate counterparts, and all of said ------------
counterparts taken together shall be deemed to constitute one and the same
instrument. A set of the counterparts of this Guarantee signed by the Guarantor
shall be lodged with the Administrative Agent.

         13.      Severability. Any provision of this Guarantee which is
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

         14.      Integration. This Guarantee represents the agreement of the
Guarantor with respect to the subject matter hereof and there are no promises or
representations by the Administrative Agent or any Lender relative to the
subject matter hereof not reflected herein.

         15.      Amendments in Writing; No Waiver; Cumulative Remedies. (a)
None of the terms or provisions of this Guarantee may be waived, amended,
supplemented or otherwise modified except by a written instrument executed by
the Guarantor and the Administrative Agent,

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provided that any provision of this Guarantee may be waived by the
Administrative Agent and the Lenders in a letter or agreement executed by the
Administrative Agent or by telex or facsimile transmission from the
Administrative Agent.

         (b)      Neither the Administrative Agent nor any Lender shall by any
act (except by a written instrument pursuant to paragraph 15(a) hereof), delay,
indulgence, omission or otherwise be deemed to have waived any right or remedy
hereunder or to have acquiesced in any Default or Event of Default or in any
breach of any of the terms and conditions hereof. No failure to exercise, nor
any delay in exercising, on the part of the Administrative Agent or any Lender,
any right, power or privilege hereunder shall operate as a waiver thereof. No
single or partial exercise of any right, power or privilege hereunder shall
preclude any other or further exercise thereof or the exercise of any other
right, power or privilege. A waiver by the Administrative Agent or any Lender of
any right or remedy hereunder on any one occasion shall not be construed as a
bar to any right or remedy which the Administrative Agent or such Lender would
otherwise have on any future occasion.

         (c)      The rights and remedies herein provided are cumulative, may be
exercised singly or concurrently and are not exclusive of any other rights or
remedies provided by law.

         16.      Section Headings. The section headings used in this Guarantee
are for convenience of reference only and are not to affect the construction
hereof or be taken into consideration in the interpretation hereof.

         17.      Successors and Assigns. This Guarantee shall be binding upon
the successors and assigns of the Guarantor and shall inure to the benefit of
the Administrative Agent and the Lenders and their successors and assigns.

         18.      Governing Law. This Guarantee shall be governed by, and
construed and interpreted in accordance with, the law of the State of New York.

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                 IN WITNESS WHEREOF, the undersigned has caused this Guarantee
to be duly executed and delivered by its duly authorized officer as of the day
and year first above written.

                                         HANOVER COMPRESSOR COMPANY

                                         By: /S/ John E. Jackson
                                            ------------------------------------
                                            Name: John E. Jackson
                                            Title: Senior Vice President and CFO

                                         Address for Notices:
                                         12001 North Houston Rosslyn
                                         Suite 350
                                         Houston, Texas 77086
                                         Attn: Chief Financial Officer
                                         Fax: 281-447-8781