TM 5-3810-289-12
return clutch to neutral and apply digging brake when pile
remove pile follower cables from hooks on hammer.
is within pile leads.
h. To drive the pile, raise hammer by pulling hoist
e. Position pile in desired location by moving crane
clutch lever toward operator. As hammer reaches top of
pile leads, return hoist clutch to neutral and apply hoist
as required (para 2-12); then, lower point of pile to
brake pedal immediately after hammer hits pile follower,
ground by slowly moving crowd and retract lever away
to prevent hammer cable overrunning the drum. Repeat
from operator, at same time applying digging brake pedal
this step until pile is driven.
to prevent cable overrunning drum.
i. Position another pile and repeat the above
f. Wrap a heavy chain around pile and leads to hold
operating cycle as often as necessary.
pile within leads; then, remove pile handling cable from
pile.
j. When work is through for the day, lower hammer
Note. The chain should be sufficiently loose not to
to rest on pile follower, and disengage engine clutch.
bind pile when driving begins.
k. Stop engine (para 2-16).
g. Lower hammer and pile follower by releasing hoist
brake lock and pressure on hoist brake pedal allowing
hammer and pile follower to drop
slowly to top of pile. Position pile in follower, then
Section V. OPERATION UNDER UNUSUAL CONDITIONS
2-23.
Operation in Extreme Cold
are necessary. When approaching a point of being
bogged down, back up about 20 feet immediately. By
a. The use of an antifreeze is necessary when the
temperature of the outside air is apt to below 32 F.
reversing the tracks, the mud will work out and clean
itself so that full propelling power can again be utilized.
Protect the cooling system against freezing early enough
Do not try steering when bogged down. When working in
so that there will be no danger of a sudden cold spell
mud, it is common practice to operate with looser track
causing a freeze-up and possible damage to the engine
belts than on dry ground.
head, block or radiator. Refer to paragraph 2-1.
b. When bogged down in a mud hole, machine can
b. Clean out excessive mud or dirt in the track belts.
often be cleared by anchoring the hoist rope to a dead
This is particularly important in freezing weather. Put
man, pulling the boom down to lift rear of tracks up and
planks, brush or dry material under crawlers before
placing timber or planking under them. Swing machine
shutting down machine if it likely to freeze.
180 degrees and repeat above steps to free opposite
track belt. If track belts are caked with mud, it may be
2-24.
Operation in Extreme Heat
necessary to back off front tumbler takeoff screws to
relieve tension in track belts.
If a tree or heavy
The most important precaution in operating extreme heat
equipment is not available to serve as an anchor, a dead
is to watch engine operating temperature and keep
man can be made by digging a 2-foot trench, inserting a
radiator well filled. Use correct lubricants for operating
log therein, and driving stakes to hold log down.
temperatures. Consult engine section.
c. Help in propelling, across soft ground, and when
2-25.
Operation in Mud or Soft Terrain
track belts slip, thus not making full use of power, can be
obtained by attaching hook to a stationary object and
a. It is generally advisable to avoid a bad spot by
pulling on the hoist cable by slipping clutch while
detouring, if possible, even if it means an extra mile or
propelling for a short period of time. It is far better to put
two of traveling. If this is not possible, send a man on
a longer cable on drum and use a block on an anchor to
foot ahead of the machine to probe the firmness of the
make a two-part hitch. Thus the two-part rope speed
ground. A long rod can be pushed down in soft spots to
nearly equals the traveling speed and drag clutch can be
test for firmness under the mud. When the track sinks in
fully engaged.
the mud below 6 inches, planks or logs laid crossways
under caterpillars, or the use of mats
2-58
