TM 5-3895-363-13&P
7.2.4 Remove oiler plug on top of piston and fill oil
chamber with 3 1/2 qts. (3.3 Ltrs.) of motor oil
(Fig. 15).
Summer
Winter
50W oil
30W oil
Figure 15
7.2.5 Install oil plug and tighten securely (Fig. 16).
Figure 16
7.2.6 Pull trip rope and hold down. SLOWLY lower
the piston until the tripping device rests on
top of the tank (see Fig. 13). Then release
trip rope.
WARNING:
Dropping the piston will cause trip damage
or could lead to accidental firing. With an en-
gaged trip, this could cause serious damage
to the machine and be hazardous to the crew.
7.3 GREASING
7.3.1 With impact block full in, grease each of the
lower cylinder fittings with 4 to 5 shots. Do
not grease when impact block is in a drop
down position, since this will put grease in
firing chamber (see Fig. 4).
7.3.2 See Section 10 for grease specifications and
daily maintenance.
7.4 CLEANING COMBUSTION CHAMBER
7.4.1 In the event that contaminants enter combus-
tion chamber (generally, rain water or excess
fuel), the hammer will not fire. The chamber
must be cleaned.
7.4.2 Remove clean-out plug (Fig. 17), pull pump
lever rope to shut off fuel, then drop piston
(cold blow) until it blows clean.
Figure 17
7.4.3 Reinstall clean out plug.
8. REMOTE ADJUSTABLE FUEL PUMP
8.1 FUEL PUMP – DESCRIPTION
8.1.1 The fuel pump is of fixed displacement,
equipped with a regulating expansion
chamber remotely controlled.
8.1.2 The regulating control enables the operator
to control the piston stroke in case the piston
jumps too high in hard driving with unusually
high rebound or on batter piles. Mainly, it is a
back-up system to shut off the hammer in
case the pump lever rope breaks.
9
