TM 5-3810-289-12
be obtained by adjustment, the band should be replaced.
3-34.
Cone Roller Service
b. Adjustment (fig. 3-18). Adjustment must
Refer to current lubrication order and lubricate
be made in sequence as follows:
the cone rollers as required.
(1) With control lever in neutral position
adjust length of control reach rod until rear detent in cam
3-35.
Vertical and Horizontal Swing and Propel
is centered by brake cam roller.
Shafts Inspection and Service
(2) With control lever in neutral position,
a. Inspection. Inspect shaft couplings and
adjust brakeband wear adjustment nuts until gap is 1/8
assemblies for wear or damage.
to 3/16 inch (between cam rear detent faces and brake
b. Service. Check for proper lubrication and
cam roller).
lubricate if necessary. Refer to lubrication order.
(3) The above adjustment must be made
periodically as brake lining wears, to secure proper
3-36.
Hoist Assemblies Inspection and Service
timing between clutch set and brake release during
a. Inspection.
boom raising.
(1) Boom hoist.
Check for proper
(4) The brake set spring, which supplies
operation and secure mounting. Proper operation, in this
the brakeband setting force, is adjusted at the factory
case, means the boom responds correctly to being
and should not require any further adjustment for loads
raised or lowered according to the position of the boom
within the rated capacity of the machine.
hoist lever, and that, when the lever is placed in the
neutral position, the boom hoist brake effectively holds
3-31.
Digging Lock Inspection and Service
the boom in position. If the boom continues to creep
a. Inspection.
The digging lock has no
lower after putting the boom hoist lever in neutral, the
fraction linings or springs to get out of adjustment. It will
boom hoist brake must be adjusted (para 3-30) or
seldom require attention, but if it is not operating
replaced. If the boom hoist clutch slips, it should be
properly, place the digging lock lever in the forward notch
adjusted (para 3-29) or replaced.
of its quadrant and check to see that the two pawls (fig.
(2) Hoist.
The hoist should respond
properly while raising or lowering a load. If the hoist
b. Service.
clutch slips, it should be adjusted (para 3-29) or
(1) Grind or file ends of pawls if a bur
replaced.
prevents full engagement.
(3) Lowering chain. Check condition and
(2) Clean and oil pawl pins so that the
tension of power load lowering chain and shorten if
pawls move freely.
necessary. To shorten chain, remove connecting link by
taking out cotter pins. Take off desired number of links
3-32.
Chain Case Assembly Inspection and Service
and reconnect again with connecting link.
a. Inspection. Inspect chain case for secure
b. Service. Lubricate as required. Refer to
mounting and proper oil level.
lubrication order.
b. Service.
(1) Tighten loose mounting.
3-37.
Piledriver Service
(2) Fill chain case to proper oil level.
In normal operation with drop hammers, leads
Refer to lubrication order.
should be lubricated once per shift with open gear
lubricant. After applying lubricant, run hammer up and
3-33.
Center Gudgeon Bushing Service
down; apply lubricant until hammer leads and guides are
a. Lubricate center gudgeon bushing as
well lubricated.
required. Refer to lubrication order.
b. Refer to lubrication order and service the
pivot bushing.
3-30
