Low Clutch Inspection and Repair

TM 10-3930-634-34

(b) Grind off rivet at washer (4). Remove washer

chipped, nicked, or pitted condition. Replace bearing if

(4), rivet (5) and withdraw tube (7) from case (18). Slide

any of these defects are found.

tube clip (6) from tube (7).

(2) Inspect gears and splined parts for burrs,

(c) Slide new clip (6) on new tube (7) and posi-

chipped, scuffed, nicked, or worn condition, Remove

tion in case (18).

burrs with a soft stone. Replace defective or damaged

(d) Secure tube to wall of case with rivet (5) and

parts.

washer (4).

(3) Inspect inner and outer discs for evidence of

(e) Install a new packing (3) and retainer (2) over

excessive wear, breaks, or cracks. The clutch pack is

end of tube (7). Secure with screws(1).

self adjusting therefore, the manufacturer does not

(2) Inspect tubes (8, 14 and 16) in the case for

provide maximum wear limits.

damage or leaking condition, Replace a defective tube

(4) Inspect return springs for breaks, cracks, dis-

as follows:

tortion or evidence of permanent set. Free length of re-

(a) Using a drill the same size as the outside di-

turn springs (20, fig. 4-50) is 2.170 inches, Load

ameter of the tubes at the sleeves; drill out the ends of

length of 1.50 inches requires a load of 80 to 100

the tubes as required.

pounds.

(b) Remove retaining rings (10), oil distributor

(5) Replace seal rings with new parts,

(11) and ball (12). Remove and discard drilled out tubes

(6) Inspect retaining rings for distortion, breaks,

(8, 14 and 16), tube sleeves (9, 15 and 17) and packing

nicks, or other damage. Replace defective retaining

(13).

rings. Ring must snap tight in its groove for proper

(c) Place a new packing (13) into the bore of oil

functioning.

distributor (11), into which pressure tube (14) is in-

n. Low Clutch Inspection and Repair

serted.

(1) Inspect bearings for roughness of rotation,

(d) Position new tubes (8, 14 and 16) in the case

chipped, nicked, or worn condition. Replace bearings if

(18). Slide oil distributor (11) into place, positioning

any of these defects are found.

tubes (14 and 16) into their proper bores. Ball (12) is

(2) Inspect gears and splined parts for burrs,

installed to properly aline that oil distributor which is

chipped, scuffed, nicked, or worn condition. Remove

secured by two retaining rings (10).

burrs with a soft stone. Replace defective or damaged

(e) Slide new tube sleeves (9) over both ends of

parts.

pressure tube (8) and new tube sleeves (15 and 17) over

(3) Inspect inner and outer discs (19 and 20, fig.

the forward end of tubes (14 and 16). Press the sleeves

4-51) for evidence of excessive wear, breaks or cracks.

firmly into the bores of the case.

Replace if any of these defects are found. The clutch

pack is self adjusting therefore, the manufacturer

(f) Using expander tool no. CE805 (FSCM

12603), pull the mandrel shaft out as far as possible

does not provide maximum wear limits.

and insert expander in tube. Be sure that the ends of

(4) Inspect piston return spring for broken condi-

the tube remain flush with the face of the case (fig.

tion, distortion, or evidence of permanent set. Free

4-54).

length of return spring (15) is 2.70 inches. Load length

of 1.50 inches requires a load of 80 to 100 pounds.

(g) Turn the mandrel by hand until tool is firm-

ly seated, then use a hand wrench and turn mandrel as

(5) Replace seal rings with new parts.

far as possible. Back off mandrel and remove tool.

(6) Inspect retaining rings for distortion, breaks,

(3) After installing new tubes, clean the case and

nicks, or other damage. Replace defective retaining

tube assembly.

rings. Ring must snap tight in its groove for proper

(4) Inspect gear and splined output shaft for

functioning.

nicks, chips, burrs, damaged teeth and damaged

o. Transmission Front Cover Inspection Repair.

splines. Remove burrs with a soft stone. Replace the

(1) Inspect items removed for cracked, pitted or

part if other defects are found.

damaged condition. Replace damaged parts as re-

(5) Replace all preformed packings and oil seals

quired.

(2) Inspect pressure tubes (17 or 18, fig. 4-45) in

with new parts.

the cover for damage or leaking condition. If tubes are

(6) Inspect hardware, threaded parta and thread-

damaged or leaking, replace front cover as an as-

ed openings for damaged threads. Chase damaged

sembly.

threads with correct size tap or die. Replace damaged

hardware.

p. Transmission Case Inspection and Repair.

q. Low Clutch Reassembly.

(1) Inspect suction tube (7, fig. 4-53) in the case

for damage or leaking condition. Replace a defective

(1) Position new seal rings (22 and 23, fig. 4-51)

tube as follows:

into grooves of piston (21). Insert piston (21) into

(a) Remove two screws (l), retainer (2) and pack-

clutch drum (24) using caution not to damage the seal

ing (3).

rings.

4-22