TM-9-2815-225-34-P
ENGINE, DIESEL: 6 CYLINDER IN-LINE TURBOCHARGED, CUMMINS MODEL NTC-400
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
JULY 2005
TM-9-2815-225-34-P - Page 280 of 736
TM 9-2815-225-34&P
0030 00
0030 00-2
ENGINE RETARDER (Contd)
DISASSEMBLY
WARNING
Control valve cover is under control valve outer spring
pressure. Hold cover securely when removing screws. Failure
to comply may cause injury to personnel.
1.
Remove two screws (5) and control valve covers (4) from brake housing (13).
2.
Remove two outer control valve springs (2) and two inner control valve springs (3) from brake
housing (13). Discard outer control valve springs (2) and inner control valve springs springs (3).
3.
Remove two control valves (1) from brake housing (13).
4.
Disconnect electrical harness (7) from solenoid valve (6).
5.
Using solenoid valve wrench, remove solenoid valve (6) from brake housing (13).
6.
Remove lower seal ring (10), center seal ring (9), and upper seal ring (8) from solenoid valve (6).
Discard seal rings (10), (9), and (8).
7.
Remove two screws (17), washers (16), master piston springs (15), and master pistons (18) from
brake housing (13). Discard springs (15).
8.
Remove two locknuts (11) from setscrews (12) and brake housing (13). Discard locknuts (11).
9.
Remove two setscrews (12) from brake housing (13).
WARNING
Slave piston spring is highly compressed. Be extremely
careful during disassembly. Personal injury can occur if
spring force is not controlled.
NOTE
Perform steps 10 and 11 to remove two slave piston
assemblies.
10.
Using a C-clamp and deep-welled socket, compress slave piston spring (20) and remove retaining
ring (22) from brake housing (13). Slowly release slave piston spring (20) pressure and remove
C-clamp and deep-welled socket.
11.
Remove slave piston retainer (21), slave piston spring (20), and slave piston (19) from brake
housing (13). Discard spring (20).
12.
Remove electrical terminal (14) from brake housing (13).
13.
Repeat steps 1 through 12 for remaining two engine retarders.
CLEANING AND INSPECTION
1.
For general parts cleaning information, refer to CLEANING, WP 0051 00.
2.
For general parts inspection information, refer to INSPECTION, WP 0051 00.
NOTE
Replace any part that does not pass visual inspection or is
outside specified wear limits.
3.
Inspect slave piston retainers (21) for cracks, breaks, or bends.
4.
Inspect brake housing (13) for cracks, breaks, stripped threaded holes, and scores or scratches in
piston bores. Repair any stripped threaded holes.
5.
Ensure control valves (1), master pistons (18), and slave pistons (19) move freely in the bores.
Replace control valves (1), master pistons (18), or slave pistons (19) if any binding occurs.
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