TM 5-4310-277-14
Malfunction
Test or Inspection
Corrective Action
d. Move the engine away from the compressor until there is tension on the V-belts. Depress belts until one
half inch (1.27 cm) depression is obtained.
e. Tighten the engine mounting hardware. Be extremely careful that the engine is square in relation to the
mounting base and flywheel to avoid binding and excessive wear of the V-belts.
f. Install the belt guard.
Step 2. Inspect aftercooler tube and check valve for carbon and wear.
Replace a damaged tube, paragraph 4-24. Replace or repair a damaged check valve, paragraph 4-32.
Step 3. Inspect all valve seats and cages for cracks, breaks, rough or scored seats, and mating surfaces. To check for damaged
valves, disconnect necessary tubing and refer to Figure 4-8 and remove bolts (1, 6 and 9), manifolds (2, 3, 7 and 10),
and valves (4, 5, 8 and 11). Disassemble the valves, Figure 4-9, as follows: Remove the four screws and lockwashers
(1), intake valve seat (2), valve disc (3), valve spring (4), intake valve cage (5), valve gaskets (6 and 7), exhaust valve
cage (8), valve spring (9), valve disc (10), exhaust valve seat (11), valve gaskets (12 and 13), intake valve seat (14),
valve disc (15), valve spring (16), intake valve cage (17), valve gaskets (18 and 19), exhaust valve cage (20), valve
spring (21), valve disc (22), exhaust valve seat (23), and valve gasket (24).
If valve components are damaged, replace them as necessary. Install the valve gasket (24, fig. 4-9), valve seat
(23), valve disc (22), valve spring (21), exhaust valve cage (20), valve gaskets (18 and 19), intake valve cage
(17), valve spring (16), valve disc (15), intake valve seat (14), valve gaskets (12 and 13), exhaust valve seat
(11 ), valve disc (10), valve spring (9), exhaust valve cage (8), valve gaskets (6 and 7), intake valve cage (5),
valve spring (4), valve disc (3), intake valve seat (2) and the four screws and lockwashers (1). After assem-
bling new components, install the assembled valves (4, 5, 8 and 11, fig. 4-8). Install manifolds (2, 3, 7 and 10)
and secure with bolts (1, 6 and 9). Reconnect all tubing.
4-15
