Table 2-4. Troubleshooting - Continued
Malfunction
Probable cause
Corrective action
a. Oil pump defective .............................
a. Repair or replace (para 3-45 or 3-46).
7. Low, or no oil pressure ..................
b. Worn rod, or shaft bearings ...............
b. Replace (paras 3-57 or 3-58 and
a.
Loose main bearings .........................
a. Replace (para 3-60 or 3-61).
8. Metallic knock under load ..............
b.
Incorrect valve adjustment ................
b. Adjust (TM 5-3810-201-12).
c.
Engine incorrectly timed ....................
c. Time engine (para 3-30 or 3-31).
d.
d. Replace (para 3-57 or 3-58).
Defective piston(s) ............................
a.
Loose main bearings ........................
a. Replace (para 3-60 or 3-61).
9. Metallic knock when engine idles ..
b.
b. Replace (para 3-54 or 3-55).
Defective valve .................................
c.
Incorrect valve adjustment ................
c. Adjust (TM 5-3810-201-12).
d.
Engine incorrectly timed ....................
d. Time (para 3-30 or 3-31).
a.
a. Replace (para 3-7).
Worn clutch plate .............................
10. Engine clutch grabs ....................
b.
b. Repair or replace (TM 5-3810-201-12).
Defective linkage. ............................
c.
Incorrectly adjusted ...........................
c. Adjust (TM 5-3810-201-12).
a.
Incorrect adjustment ..........................
a. Adjust (TM 5-3810-201-12).
11. Engine clutch will not engage .....
b.
b. Replace (para 3-7).
Worn clutch facing ............................
c.
c. Replace (para 3-7).
Worn pressure plate ..........................
d.
d. Replace (para 3-7).
Worn release bearings ......................
a.
a. Clean lining or replace (para 4-11
Glazed lining......................................
12. Operating clutch noisy ................
b.
b. Replace lining (para 4-11 through 4-28).
Rivet rubbing drum
a.
Broken or damaged gear teeth .........
a. Replace gears (para 4-11 through 4-28).
13. Deck machinery noisy .................
b.
b. Replace (para 4-11 through 4-28).
Worn shaft bearings ..........................
c.
c. Repair or replace defective parts
Worn or defective clutches and .........
brake drums .................................
a. Defective clutch or brake .................
a. Repair or replace (para 4-17 and 4-18).
14. Boom hoist inoperative ................
b. Defective hoist drum pinion or
b. Replace (para 4-15).
shaft.
a. Defective mechanical linkage ...........
a. Check and repair or replace defective
15. Swing brake does not hold .........
or missing-parts (para 4-24).
b. Worn lining-- ......................................
b. Replace (para 4-24).
c. Out of adjustment ..............................
c. Adjust (TM 5-3810-201-12).
d. Hydraulic system has air in, or ..........
d. Bleed, and replace defective
leaks ...........................................
components (TM 5-3810-201-12).
a. Lack of lubrication .............................
a. Lubricate (LO 5-3810-201-12).
16. Improper or slow clutch release ...
b. Bent (defective) hydraulic line be-
b. Replace (TM 5-3810--201-12).
tween cylinders.
c. Return spring tension weak ...............
c. Replace (para 4-17 through 4-18).
a. Linkage out of adjustment or ............
a. Adjust (TM 5-3810--201-12) or
17. Propel brakes or clutch do not .....
release properly
defective ......................................
replace- (paras 5-5 and 5-6).
b. Defective return line from brake .......
b. Replace line (TM 5--3810-201-12).
Or clutch cylinder.
a. Gear teeth dry ...................................
a.
Lubricate (LO 5-3810-201-12).
18. Vertical propel gears and shaft ...
b. Worn gears ........................................
b.
Replace para 4-28).
noisy
c. Worn sleeve bearings ........................
c.
Replace (para 4-28).
d. Bent shaft ..........................................
d.
Replace (para 4-28).
a. Out of adjustment ..............................
a.
Adjust (TM 5-3810-201-12).
19. Propel brakes do not hold ...........
b. Defective cylinder (compensator)
b.
Replace (para 4-36 and 4-40).
c. Worn lining
c.
Replace (para 5-6).
d. Defective brakeshoes -
d.
Replace (TM 5-3810- 201-12).
a. Track out of adjustment .....................
a.
Adjust (TM 5--3810-201-12).
20. Track pins, bushings and shoes ..
b. Track improperly installed ................
b. Reinstall properly (TM 5-3810-201-12).
wear excessively
c. Drive sprockets and front idler ...........
c. Adjust (TM 5-3810-201-12).
sprockets out of adjustment.
a. Steering brakes and clutches ............
a. Adjust (TM 5-3810-201-12).
21. Crane does not steer properly .....
out of adjustment.
b. Steering linkage out of adjustment ....
b. Adjust (TM 5--3810-201-12).
c. Defective steering control linkage ......
c. Repair or replace (para 5-4).
AGO 20051A
2-7
