TM 5-3810-307-10
The lubrication system provides lubricating oil to the lower cylinder and piston during operation.
The system consists of the lubricating oil tank, oil tank fill line and quick connect fitting, oil pump,
oil pump feed shutoff valve, oil pump inline priming pump, and associated lines and fittings.
The lubricating oil tank, located on the front of the upper cylinder, provides lubricating oil via
gravity feed to the oil pump located on the rear of the lower cylinder. The in-tank suction
strainer, located inside the lubricating oil tank, filters the oil prior to being delivered to the
system. An oil tank plug/vent valve, located on top of the lubricating oil tank, is used to vent the
system during impact hammer operation.
The lubricating oil tank is filled from the ground by connecting the hose and quick connect fitting
to the ground oiling hand pump, placing the oiling hand pump container cover on an oil
container filled with MIL-L-2104 15W40 oil, and installing the ground oiling hand pump in the
container cover. Then connect the quick connect fitting on the ground oiling hand pump to the
oil tank fill line and quick connect fitting located at the bottom of the lower cylinder and manually
pump oil to the lubricating oil tank on the impact hammer. The oil tank fill line and quick connect
fitting are identified by a yellow-colored "OIL" label. In the absence of the ground oiling hand
pump, the lubricating oil tank can also be filled manually by removing the oil tank plug/vent
valve. For temperatures below -20.0 F (-29 C), arctic-grade MIL-L-46167 0W40 oil should be
used.
The oil pump is an air-activated, single plunger-type pump that pumps the lubricating oil to the
lower cylinder via an oil line and fitting. Inlet and outlet check valves on the oil pump prevent oil
from flowing in a reverse direction.
The oil pump feed shutoff valve is used to turn off the oil feed to the oil pump from the
lubricating oil tank. The oil pump inline priming pump is used to prime the system for initial
startup.
The impact hammer is equipped with a battery-powered blow count recorder located at the top
of the direct drive assembly. The blow count recorder is an indicator that provides the operator
with a running count of blows delivered. The blow count recorder and battery pack are
protected by a foam cushion insert and housed in a weather-proof housing with a viewing
window. The internal battery pack is designed to last for two years.
The impact hammer is equipped with a fitting for an optional velocity sensor located on the
lower part of the upper cylinder, directly below the fuel tank. A velocity sensor cover plate is
installed over the fitting.
The impact hammer has several major data and safety plates and decals. The Identification
Plate, located on the top side of the direct drive assembly, specifies the name of the
manufacturer, model number, National Stock Number, USA Registration Number, manufacture
date, contract number, weight, and serial number. The Identification Bar Code Plate, located on
the side of the fuel tank and readable by a hand-held scanner, provides comprehensive
information about the impact hammer. "HOT AREA" warning and "LIFT POINT" location plates
are located at the cooling fins and upper/lower cylinder lifting lugs respectively. Safety and hard
hat warning decals are located on the side of the direct drive assembly. "PINCH POINT" warning
decals are located at the upper and lower gibs.
Remote Throttle (Refer To Figure H-5.)
The remote throttle provides remote speed control and shutdown of the impact hammer diesel
engine. The remote throttle can be installed in the superstructure cab if desired.
The remote throttle is a hydraulically-operated, bypass device that controls the stroke rate of the
impact hammer by controlling the amount of fuel delivered to the fuel injectors by the fuel pump.
It consists of a hydraulic reservoir and pump, a movable handle, pressure relief valve, pressure
gauge, 70-foot (18 m) hydraulic hose, and associated fittings. The remote throttle is filled via a
fill plug and utilizes automatic transmission fluid Dexron II/III or equivalent. A pressure relief
Change 1 H-15
