TM 5-3810-300-24 & P2
The DLB clutches are equipped with hardened steel drive lugs to afford the maximum amount of area to drive the
pressure plate. The DLB also incorporates spring retainers. The DLB type used is with two plates.
The operation of the Lipe Direct Pressure clutch is as follows: The clutch fly-wheel ring (cover) is attached to the engine
flywheel and drives the pressure plate by means of driving lugs in the flywheel ring (cover) and mating slots in the
pressure plate.
Depressing the clutch pedal disengages the clutch, by allowing the release bearing to contact and move the release
levers toward the engine flywheel resulting in the pressure springs being compressed and the pressure plate being
retracted away from the disc assembly; thereby disengaging the clutch.
Releasing the clutch pedal engages the clutch by allowing the release bearing and release levers to move away from the
engine flywheel and the pressure springs to expand and exert pressure against the pressure plate, resulting in the disc
assembly being gripped between friction surfaces of engine flywheel and pressure plate; thereby completely engaging
the clutch.
Constant Speed Pump Drive. (Illus. 4-11).
The constant speed pump that is used to drive the hydraulic pumps is engine driven. The pump is connected to the
engine by a drive shaft.
Front Axle and Steering System. (Illus. 4-12).
Front Axles. Rockwell-Standard's non-driving front axles incorporating sealed knuckle pins and permanently lubricated
(sealed) tie-rod end assemblies have less maintenance requirements than front axle models employing conventional
knuckle pins and tie-rod end assemblies.
The sealed type knuckle pins are of the straight design and may or may not be grooved depending on the type of bushing
employed. Knuckle pins of this type also employ two flats for correct positioning inside the axle center, and are held in
place by tapered dowel keys.
The lubricant is protected within the knuckle from road contamination by grease seals and gaskets that enclose the upper
and lower knuckle pin bushings.
The upper bushing is sealed from the top by a gasket located beneath the upper knuckle pin cap. It is protected from the
bottom by a grease seal positioned below the bushing, inside the upper knuckle boss. The lower bushing is enclosed on
the top by the thrust bearing and seal assembly, and on the bottom by a gasket positioned between the lower knuckle
boss and the lower knuckle pin cap. Some models may employ an integral gasket in the lower seal or thrust bearing.
Steering knuckles are bushed in the upper and lower knuckle pin bosses with steel backed bronze bushings.
Many front axle models employing sealed knuckle pins also incorporate enlarged steering knuckle assemblies (oversized
4-32
