Removal of Camshaft and Balance Shaft

TM 10-3930-634-34

(2) Lubrication is supplied under pressure to the

(3) Mount the engine on an overhaul stand. Be

sure the engine is securely mounted on the stand be-

c a m s h a f t and balance shaft end bearings by oil

fore releasing the lifting sling.

passages. Oil is forced through an oil passage in the

(4) Remove the cylinder head (para 3-25).

camshaft which lubricates the camshaft intermediate

(5) Remove the flywheel and the flywheel housing

bearings,

b. Removal of Camshaft and Balance Shaft.

(paras 3-32 and 3-33).

(6) Remove the bolts which secure the gear nut re-

(1) Drain the cooling system (TM 10-

3930-634-12).

tainer plates to the gears. Remove the retainer plates.

(2) Remove the engine (para 2-5) and accessory

(7) Wedge a clean rag between the gears as shown

parts and assemblies necessary to mount engine on an

in figure 3-118. Remove the nuts from each end of

overhaul stand.

both shafts with a socket wrench.

(8) Remove the pulleys from the camshaft and the

balance shaft and remove the engine upper front cover

(fig. 3-119).

(9) Remove the oil slinger from the front end of

both shafts.

(10) Remove the two thrust washer retaining

bolts that secure the camshaft and balance shaft

thrust washer to the cylinder block, by inserting a

socket wrench through a hole in the web of the gear.

(11) Withdraw the shaft, thrust washer, and gear,

as an assembly, from the rear of the cylinder block.

c. Disassembly of Camshaft and Balance Shaft.

(1) Refer to figure 3-120 and disassemble the

camshaft and balance shaft in numerical sequence.

(2) Press the gear from the camshaft (fig. 3-121).

Place a wood block under the shaft so the threads will

not be damaged when the shaft is pressed from the

gear.

(3) Remove key (18, fig. 3-120), thrust washer

(16) and spacer (17) from camshaft (2).

(4) Press the gear from the balance shaft (fig.

3-121). Place a wood block under the shaft so the

threads on the opposite end of the shaft will not be

damaged when the shaft is pressed from the gear.

(5) Remove the thrust washer (16, fig. 3-120)

from balance shaft (19).

3-74