TECHNOLOGIES
ORPORATION
SERVICE BULLETIN M1A-162K
INSTRUCTIONS:
INSPECTION AND REPLACEMENT OF THE MASTER CYLINDER
RESERVOIR CAP ON UNITS EQUIPPED WITH BOSCH HYDRO-BOOST
BRAKE UNITS WITH LEAKING MASTER CYLINDERS
EFFECTIVITY:
UNITS EQUIPPED WITH BOSCH HYDRO-BOOST BRAKE UNITS WITH LEAKING MASTER CYLINDERS
CONTENTS
PAGE
PURPOSE..................................................................................................... 2
PARTS LIST ................................................................................................ 2
SCOPE OF WORK ..................................................................................... 2
INSTRUCTIONS ...................................................................................... 2-5
Kyle Behnke,
January, 2008
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Purpose: Provide instructions for inspection and replacement of the
master cylinder reservoir caps on M1A units.
LABOR REQUIREMENTS: 0.10 HOURS
Parts List:
Item
1
2
3
Part Number Description
Quantity
660-1-1342-3NC CAP, MASTER CYLINDER RESERVOIR
FLUID, BRAKE, DOT 3, EXTRA HEAVY DUTY
TUG WARRANTY/RGA TAG
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AS REQ-ED
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Scope of Work:
A.
B.
C.
D.
Preparation: Safety Procedures
Disconnect battery
Instructions
Preparation for use
WARNING: READ AND UNDERSTAND ALL INSTRUCTIONS BEFORE
BEGINNING PROCEDURE!
INSTRUCTIONS
A. Preparation: Safety Procedures:
1. Observe all safety requirements for tool usage and OSHA facility guidelines.
B. Disconnect battery:
1. Park the M1A on level ground. Turn the ignition key off, chock tires and/or apply
park brake.
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2. Disconnect battery.
C. Instructions:
1. Check the master cylinder for leakage. If there are no leaks evident, the tractor may
be returned to service. Check around the cap and on the sides of the master cylinder
for evidence of brake fluid (See Fig. 1).
Figure 1.
2. Remove the master cylinder cap and check the fluid level (See Fig. 2)
.
Figure 2.
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3. If there are signs of leaking brake fluid, add brake fluid as necessary to the master
cylinders, to within 1/8” from the top. Then, install the new master cylinder reservoir
cap.
4. Save the old cap. These must be returned to Bosch Corporation for analysis.
5. Record the date code. The date code is a 4 digit number located on the end of the
barrel of the master cylinder (See Fig. 3).
Figure 3.
6. Fill out a Tug Warranty Claim sheet. Note the date code of the master cylinder on the
sheet.
7. Return the master cylinder cap with the Tug Warranty Claim sheet to:
Attn: Bill Raby
Robert Bosch Corporation
375 North Belevedere Drive
Gallatin, TN 37066
D. Preparation for use:
1. Reconnect the battery.
2. Bleed brakes as necessary to remove air from the brake lines. To bleed the brake
system, make sure the master cylinder is full. One person must open the bleeder
valve, while a second person depresses the brake pedal one full stroke. The person at
the bleeder valve should close the bleeder valve, then allow the pedal to return slowly
to the released position. Allowing the pedal to return too quickly may draw air into
the system. Continue operating the pedal in this manner until one cylinder if bled.
Refill the master cylinder and go on to the next cylinder or caliper.
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3. If problems persist, contact Tug Warranty
E-Mail: [email protected]
Phone: 1-800-989-8499
. If the brakes operate properly, return the tractor to service.
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