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 TM 55-1905-221-14-4
6-37. POWER TAKE-OFF ASSEMBLY.
a. General.
1. The front end direct drive, 35 HP rating, power take-off illustrated below is attached to the front end of the
engine and driven by the crankshaft, includes an 8 inch diameter one piece single plate dry disc-clutch facing (1). A
coupling and flange assembly (2) is keyed and retained on the crankshaft by a special washer and bolt. A clutch drive
adaptor (3) and an accessory drive pulley (4) is bolted to the coupling and flange assembly. The clutch driving ring (5) is
bolted to this assembly. The clutch drive shaft (6) is supported by a pilot ball bearing (7) at the forward end and tapered
roller bearings (8 and 9) at the outer end. The clutch housing (10) is attached to the power take-off adaptor (11).
2. The tapered roller bearings (8 and 9) absorb the greatest portion of the thrust and radial load on the clutch
drive shaft. An adjustable bearing retainer (12) is secured with a lock plate (13) and a bolt (14), provides a means of
adjusting the tapered roller bearings.
3. The front end power take-off adaptor (11) supports the power take-off assembly and surrounds the clutch
and drive mechanism. The adaptor retains the crankshaft front oil seal (15) and is bolted to the engine front end plate
and cylinder block.
4. The clutch mechanism consists of a one piece dry disc clutch facing. The clutch facings are supported in
and driven by the driving ring (5). An outer pressure plate (16) is keyed to and retained on the clutch drive shaft by a nut
(17), and inner pressure plate (18) are carried on the hub of and driven by the outer pressure plate. Clutch pressure plate
separator springs (19) separate the inner and outer pressure plates when the clutch is disengaged, and a clutch adjusting
ring (20) to adjust for wear on the clutch facings; a clutch release sleeve (21), together with linkage assembly, operated
by a clutch release collar (22), a yoke (23), and a hand operated lever (24) for engaging and disengaging the clutch. The
clutch release lever springs (25) assists in holding the clutch in the disengaged position.
b. Operation.
1. When the hand lever (24) is moved toward the engine, yoke (23) moves the release sleeve (21) toward the
clutch. This movement forces the outer end of links (26) away from the axes of rotation causing the levers (27) to
contact the face of the adjusting ring (20), which locks the clutch facing (1) between the outer and inner pressure plates
(16) and (17). Thus, the power of the engine is transmitted to the drive shaft (6).
6-739
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