ISSUE DATE: 2/25/2011

PROGRAM INFORMATION BULLETIN NO. P11-01 

FROM: LINDA F. ZEILER 

 Acting Director of Technical Support 

KEVIN G. STRICKLIN 

 Administrator for 

 Coal Mine Safety and Health 

 

SUBJECT: Redesign of the Emergency Stop Circuits on Model BHAC Joy Mining 

 Machinery (formerly Stamler Corporation) Battery Coal Haulers

Scope

This Program Information Bulletin (PIB) applies to mine operators, miners’ representatives, 

Mine Safety and Health Administration (MSHA) enforcement personnel and other interested 

parties. 

Purpose

The purpose of this PIB is to inform the mining community that MSHA has approved a safety 

upgrade to the emergency stop switch circuit on the Joy Battery Coal Hauler (Approval No. 18-

A060011-0). Additionally, this PIB includes recommendations concerning operation of the 

emergency stop switch. 

Information

Joy Mining Machinery has designed and received MSHA approval for a safety upgrade to the 

emergency stop switch circuit on the Joy Battery Coal Hauler (Approval No. 18-A060011-0). 

The upgrade ensures against inadvertent movement of the machine when the emergency stop 

switch is activated by providing a second shutdown circuit that prevents the pump from 

restarting on release of the emergency stop switch. 

MSHA recommends that mine operators: 

• Remove the machine from service if any machine light stays on after hitting the 

emergency stop switch. This is an indication that the circuit breaker has not tripped and 

the machine is still energized. 

 
2 

• Verify the proper performance of the emergency stop switch as part of the pre-operation 

machine checks. 

The second emergency stop circuit is designed and wired through the Programmable Logic 

Controller to ensure that the machine tram circuit is shut down and remains shut down when 

the emergency stop switch is activated. If the emergency stop switch is activated and any 

machine or display lights remain on, this indicates that the machine circuits remain energized 

and a problem exists. One of these problems could be failure of the circuit breaker to trip on 

activation of the emergency stop switch. Joy Mining has released a Service Bulletin (attached) 

that was distributed to all of its customers of equipment utilizing MSHA Approval No. 18-

A060011-0. The Service Bulletin provides information about an upgrade kit and describes the

wiring change to install the upgrade of the emergency stop switch circuit.

Background

MSHA became aware of an incident where activation of the emergency stop switch on a Joy 

Hauler caused the machine to come to a stop, but did not deenergize the machine. It was 

noted that the lights were still on and when the emergency stop switch was released, the pump 

motor restarted, which released the brakes and enabled the machine to be trammed. This 

could have caused unintentional movement of the machine. 

MSHA's authority for this PIB

The Federal Mine Safety and Health Act of 1977, as amended, 30 U.S.C. § 801 et seq.; 30 

CFR §§ 75.523

Internet Availability

This information bulletin 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. 

MSHA contact persons for this bulletin

Technical Support, Approval and Certification Center

Kenneth Porter, (304) 547-2030

E-mail: porter.kenneth@dol.gov 

Coal Mine Safety and Health, Safety Division

John Arrington, (202) 693-9549

E-mail: Arrington.john@dol.gov 

Distribution

Program Policy Manual Holders

Underground Mine Operators
Continued ...... 

GLOBAL SERVICE BULLETIN 

Bulletin No.: GSB0135

 Page 1 of 2 

Date Issued: 13 JUL 2010 

Product: BH10, BH18, BH20 BATTERY 

HAULERS SHIPPED BETWEEN 

2003 and 2010 

Type: ALL 

Initiated by: B. HUGHES 

Approved by: RLB/RB/COH/LJL/MS/BGDS/RWW

 ADDITIONAL METHOD OF POWER REMOVAL ON EMERGENCY STOP ACTIVATION 

ON JOY-STAMLER BATTERY HAULERS 

INTRODUCTION: 

The purpose of this Service Bulletin is to inform the industry of an additional method of power removal on emergency 

stop activation on all Joy-Stamler BH10, BH18, and BH20 Battery Haulers with a Programmable Logic Controller 

(PLC) that were shipped between 2003 and 2010. 

DISCUSSION: 

MSHA became aware of an incident where activation of the emergency stop switch on a Joy-Stamler Battery Hauler 

de-energized the pump motor but did not de-energize the machine lights. When the emergency stop switch was 

released, the pump motor started back up and enabled other features of the machine to operate. 

MSHA investigated the incident and determined that the shunt trip failed because the circuit breaker tip arm 

overheated, causing the coil of the circuit breaker’s shunt trip to melt. The cause of the overheating is still being 

investigated by MSHA. 

A design upgrade of the emergency stop switch de-energization system has been implemented, which provides a 

second shutdown circuit independent of the main machine circuit breaker. 

Joy highly recommends that customers purchase the upgrade kits: Joy P/N 100441816 for BHAC machines, P/N 

100441817 for Lionetics DC machines, and P/N 100441818 for A750 DC machines. 

RECOMMENDED ACTIONS: 

• Mine operators must verify the proper performance of the emergency stop switch as part of the pre-operation 

machine checks. 

• Remove the machine from service if the machine lights stay on after hitting the emergency stop switch. This is 

an indication that the circuit breaker has not tripped and the machine has not shut off. 

• Only trained and competent personnel should be involved in the service and operation of these machines. 

After receiving the kit, follow these step-by-step instructions to properly implement the enhancement: 

Control Station

1 Add two terminal blocks to din rail and label 14A and 14B. 

2 Install black wire in #3 pair from cable C17 to top of 14A. 

3 Install white wire in #3 pair from cable C17 to top of 14B. 

4 Label as #14A and install a #16 awg wire from bottom of terminal 14A to terminal #8 on e-stop aux relay base. 

Note: This will be terminal #3 if using drawing 98-013627. 

5 Label as #14B and install a #16 awg wire from bottom of terminal 14B to terminal #6 on e-stop aux relay base. 

 Note: This will be terminal #2 if using drawing 98-013627. 
JOY GLOBAL SERVICE BULLETIN GSB0135 ISSUED: 13 JUL 2010 Page 2 of 2 

Operator Station 

Note: Add one terminal block to din rail if using drawings 98-014525 or 98-013627 

1 Remove existing jumper from left side terminals 14 to 14. 

2 Remove purple 14 wire off of second number 14 terminal block to PLC and install black wire in #3 pair in C17 

cable and label as (14A) install to left side of second terminal block. 

3 Remove black #14 wire in C16 cable from top terminal block and install in second #14 terminal block. 

4 Install #14 purple wire from PLC and label as 14C to left side of top #14 terminal block. 

5 Install white wire in #3 pair out of C17 and label as 14B install to the right hand side of the top #14 terminal block. 

The following checks must be made to ensure this project has been properly implemented: 

1 Remove wire #48 located in machine breaker box to shunt trip. 

2 Set breaker. 

3 Start Pump. 

4 Hit Panic Bar. 

5 Confirm pump shuts down and does not restart when the panic bar is depressed and released. 

6 Reconnect wire #48. 

Contact your local Joy representative with any questions concerning this information. 

END