ISSUE DATE: 06/20/ 2011 

PROGRAM INFORMATION BULLETIN NO. P11-44 

FROM: LINDA F. ZEILER 

 Acting Director of Technical Support 

 KEVIN G. STRICKLIN

 Administrator for 

 Coal Mine Safety and Health 

NEAL H. MERRIFIELD 

 Administrator for Metal and Nonmetal 

 Mine Safety and Health 

SUBJECT: Reissue of P07-15 - Potential Safety Hazard on Permissible 

 Mobile Diesel-Powered Transportation Equipment with 

 Sandvik (formerly EJC Mining Equipment, Inc.) Wet Scrubber 

 Systems 

Who needs this information?

Mine Safety and Health Administration (MSHA) personnel, underground coal mine 

operators, underground metal and nonmetal operators, miners’ representatives, and 

repair shop facilities should have this information. 

Why is MSHA issuing this Program Information Bulletin?

This Program Information Bulletin (PIB) is issued to inform mine operators of a 

potential safety hazard on the Sandvik (formerly EJC Mining Equipment, Inc.) wet 

scrubber system. This PIB also provides information regarding mandatory periodic 

inspection of the wet scrubber system insert. 

What permissible mobile diesel-powered transportation equipment does this PIB 

address?

This PIB addresses permissible mobile diesel-powered transportation equipment that 

uses a permissible power package (safety component system) manufactured by 

Sandvik. The power package is equipped with a wet scrubber system that contains an 
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insert mounted inside an exhaust conditioner enclosure. The table below provides the 

MSHA permissible equipment approval number and the corresponding power package 

Part 36 certification number or Part 7 Subpart F approval number. 

PERMISSIBLE 

EQUIPMENT 

APPROVAL 

NO. 

POWER 

PACKAGE 

CERTIFICATION 

NO. 

PERMISSIBLE

EQUIPMENT 

MODEL NO. 

EQUIPMENT TYPE 

31-103 31/D101 936M SHIELD HAULER/SCOOP

31-110 31/D108 935-2NL SCOOP 

31-117 31/D111 975A UTILITY TRACTOR 

31-120 31/D111 975A PERSONNEL CARRIER 

31-121 31/D110 80LHD LHD 

31-124 31/D111 G600U GRADER 

31-125 31/D101 EJC-130 LHD 

31-126 31/D111 975A BOOM TRUCK 

31-128 31/D116 544-MV4 UTILITY VEHICLE 

31-131 31/D118 975A LUBE TRUCK 

31-132 31/D111 975A ROCKDUSTER 

31-135 31/D120 980L31 FIFTH WHEEL TRACTOR 

31-137 31/D111 975A LUBE TRUCK 

31-202 31/D108 935-2NL LHD 

31-203 31/D111 975A 

FIFTH WHEEL UTILITY 

TRUCK 

31-204 31/D111 975A PERSONNEL CARRIER 

31-205 31/D111 975A BOOM TRUCK 

31-206 31/D111 975A LUBE TRUCK 

31-207 31/D101 936M SHIELD HAULER/SCOOP

31-208 31/D101 130-21 LHD LHD 

31-211 31/D120 980L31 FIFTH WHEEL TRACTOR 

31-216 31/D111 975A ROCKDUSTER 

31-217 31/D110 EJC80 LHD 

31-228 31/D101 915E LHD 

31-26-3 31/D101 915E LHD 

36C-002 7F-007 913 LHD 

36C-003 7F-009 980L31 FIFTH WHEEL TRACTOR 

36C-004 7F-013 975A LUBE TRUCK 

36C-005 7F-017 936M SHIELD HAULER/SCOOP 

36C-006 7F-017 130-21 LHD 

36C-008 7F-007 PEC22 ROOF DRILL 
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What is the potential safety hazard with this permissible mobile diesel-powered 

transportation equipment with a Sandvik power package?

A weld bead crack failure may allow flames, sparks, or hot diesel engine exhaust gas to 

bypass the flame proofing, spark arresting, and engine exhaust gas cooling effects of the 

scrubber system and enter the mine atmosphere. 

The scrubber system consists of an insert that is mounted inside an exhaust conditioner 

enclosure (tank partially filled with water). The crack failure developed in and near the 

inlet flange weld bead of the insert. Some of the weld bead cracks enlarged enough to 

produce a hole in the weld and surrounding material. The Sandvik wet scrubber 

system is used on permissible mobile diesel-powered transportation equipment to 

prevent propagation of flame or discharge of heated particles to the surrounding mine 

atmosphere and to cool the diesel engine exhaust gas at the discharge from the exhaust 

conditioner. The wet scrubber system is required to cool the diesel engine exhaust gas 

to a maximum of 170 degrees Fahrenheit per 30 C.F.R. §§ 7.98(s)(4)(i) and 36.25(c), and 

arrest spark and flame per 30 C.F.R. § 7.98(s)(2) and 30 C.F.R. § 36.25(b)(3). 

Figure No. 1 and Figure No. 2 below can be referenced for a general view of the wet 

scrubber insert and the location of the cracks/holes that have been found on inserts in 

the field. 

Part Number and 

Serial Number 

on this flange

CRACK/HOLE 

LOCATIONS

Wet Scrubber Insert used on the following Equipment Approval Numbers: 31-103, 

31-110, 31-125, 31-135, 31-202, 31-207, 31-208, 31-211, 31-228, 31-26-3, 36C-003, 

36C-005, 36C-006 

Figure No. 1 
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Part Number and 

Serial Number 

on this flange 

CRACK/HOLE 

LOCATIONS

Wet Scrubber Insert used on the following Equipment Approval Numbers: 31-121, 

31-117, 31-217, 31-120, 31-124, 31-126, 31-128, 31-131, 31-132, 31-137, 31-203, 

31-204, 31-205, 31-206, 31-216, 36C-002, 36C-004, 36C-008

Figure No. 2 

What action is required on the Sandvik wet scrubber inserts?

All permissible mobile diesel-powered transportation equipment with a Sandvik wet 

scrubber system must be inspected for weld failure in the wet scrubber insert. The 

insert inspection should be conducted during the next scheduled weekly maintenance 

examination. Inserts that are found defective must be replaced with an acceptable 

insert. Sandvik has issued a technical bulletin to inform their customers on the proper 

procedure to remove and inspect the wet scrubber insert. See Attachment to view 

Sandvik’s technical bulletin. 

How often must the wet scrubber inserts be inspected?

Inserts that are inspected and found acceptable must be inspected on a quarterly basis

until otherwise indicated on the Power System Checklist Addendum. New 

replacement inserts must be inspected after one year in operation. After this first year 

inspection, the inserts must be inspected quarterly until otherwise indicated on the 
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Power System Checklist Addendum. Sandvik has included, as an addendum, an insert 

inspection requirement to their Power System Checklist. 

Inspections conducted in accordance with the Power System Checklist Addendum that 

identify a defective insert (crack, hole, or other damage) must be recorded to comply 

with 30 C.F.R. § 75.1914(f)(2). 

The results of the initial and subsequent inspections should be sent to Sandvik. Sandvik 

and MSHA will monitor the inspection results to track the performance of the inserts. 

Based on the inspection results, Sandvik and MSHA will determine if the inspection 

frequency should be changed and if additional corrective action is needed. 

The inspection results sent to Sandvik should include the permissible equipment 

approval number; type; model number; and identification number (serial number); the 

wet scrubber insert part number; serial number; and if support brackets are installed on 

the insert. 

Who can I contact at Sandvik?

Adrian Gillies 

Sandvik Mining and Construction Canada, Inc. 

4445 Fairview Street, 

Burlington, Ontario 

Canada L7L 2A4 

Phone: (905) 333-2338 

Fax: (905) 632-1344 

adrian.gillies@sandvik.com

How can the addendum to the Power System Checklist be obtained?

The Power System Checklist Addendums can be obtained by any of the following 

methods: 

 Click on one of the attachments for the applicable equipment approval 

number. 

 The addendums are available on MSHA’s website: 

http://www.msha.gov/s&hinfo/diesel.htm

Under General Information choose Sandvik Power System Checklist 

Addendums. 

 Contact one of the Approval and Certification Center (A&CC) contacts 

below. 
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 Contact Sandvik. In addition, Sandvik is responsible for distributing the 

addendum to their customers. 

Power System Checklist Addendums 

PERMISSIBLE EQUIPMENT 

APPROVAL NUMBER MODEL NUMBER 

975A 

913 

PEC 22 

80 

544-MV4 

See Attachment: 

31-117, 31-120, 31-121, 31-124, 31-

126, 31-128, 31-132, 31-137, 31-203, 

31-204, 31-205, 31-206, 31-216, 31-

217, 36C-002, 36C-004, 36C-008 G600U 

915E 

936M 

See Attachment: 

31-103, 31-125, 31-207, 31-208, 31-26-

3, 31-228, 36C-005, 36C-006 130 

See Attachment: 935-2NL 

 31-110, 31-131, 31-202 975A (Isuzu) 

See Attachment: 

31-135, 31-211, 36C-003 980L 

Can defective inserts be repaired?

Defective inserts must not be repaired. A defective insert must be replaced with an 

acceptable insert. A repaired insert may not cool the diesel engine exhaust gas or arrest 

spark and flame. The Sandvik technical bulletin provides contact information for 

Sandvik authorized distributors. 

Permissible mobile diesel-powered transportation equipment with a Sandvik wet 

scrubber system that contains a repaired insert, or an insert with cracks, holes, or 

other damage, WILL NOT be considered approved by MSHA. 

How are existing and new replacement inserts identified?

Existing inserts are identified with the “old” insert part number. The old insert part 

numbers are provided in the Sandvik technical bulletin. New replacement inserts will 

be identified with a new part number as shown in the Sandvik technical bulletin. In 

addition, the new replacement inserts will be identified with a serial number with the 

following format: 

“XXXX-XX” 

Example: 1234-07, where 1234 is a unique tracking number and 07 is the year of 

manufacture. The part number and serial number for new replacement inserts are 
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located on the inlet flange of the insert as shown in Figure No. 1 and Figure No. 2 

above. 

Are the new replacement inserts different from the old inserts?

Sandvik submitted a design modification to correct the weld crack problem to the 

A&CC for approval. The design modification has been evaluated and meets MSHA 

requirements for permissible power packages (safety component systems). 

What is the background for this PIB?

The A&CC discovered weld cracks in a Sandvik wet scrubber insert during an 

equipment field modification evaluation. 

The A&CC subsequently notified MSHA enforcement of the potential safety hazard and 

requested the inserts be visually inspected during the next scheduled weekly 

maintenance examination. The insert inspection revealed that 22% of the inspected 

inserts were defective with cracks and/or holes. 

What is MSHA's authority for this PIB?

The Federal Mine Safety and Health Act of 1977; 30 C.F.R. §§ 7.98(s)(4)(i); 36.25(c); 

7.98(s)(2); 36.25(b)(3); and 75.1914(f)(2). 

Internet Availability

This PIB may be viewed on the Internet by accessing MSHA's home page at 

(http://www.msha.gov) and then choosing Compliance Info, and Program Information 

Bulletins. 

Who are the MSHA contact persons for this PIB?

Coal Mine Safety and Health, Safety Division 

Charles Carpenter, (202) 693-9532 

E-mail: carpenter.charles@dol.gov

 

Metal and Nonmetal Safety and Health 

Neal H. Merrifield, (202) 693-9600 

E-mail: merrifield.neal@dol.gov

Technical Support, Approval and Certification Center 

Gary Clark, (304) 547-2068 

E-mail: clark.gary@dol.gov

Technical Support, Approval and Certification Center 

Steve Cole, (304) 547-2304 

E-mail: cole.stephen@dol.gov
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Who will receive this PIB?

MSHA Program Policy Manual Holders 

Miners' Representatives 

Underground Mine Operators 

Manufacturers of Mine Equipment and Mining Products 

Special Interest Groups 

Attachments

 Sandvik’s technical bulletin

Sandvik Power System Checklist Addendums relating to Permissible Equipment 

Approval Numbers: 

 31-117, 31-120, 31-121, 31-124, 31-126, 31-128, 31-132, 31-137, 31-203, 31-

204, 31-205, 31-206, 31-216, 31-217, 36C-002, 36C-004, 36C-008

 31-103, 31-125, 31-207, 31-208, 31-26-3, 31-228, 36C-005, 36C-006

 31-110, 31-131, 31-202

 31-135, 31-211, 36C-003