Komatsu PC700LC-11, Operation & Maintenance Manual

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2.
Remove the wing bolts (2) (3 places) of the grease can (1),
and remove the cover (3) together with the grease pump.
3.
Remove the follower plate (4) inside the grease can.
4.
Fill the grease can (1) with new grease. Place the follower
plate (4) on the surface of the grease. Press down the fol-
lower plate softly so that the grease comes out through the
seal portion of the center of the follower plate (4).
When setting the follower plate, fill the convex portion in
the center of the follower plate with the grease beforehand.
This makes this work smooth.
5.
Insert the grease pump into the seal portion of the center
of the follower plate (4). Set the cover (3) to the grease
can (1). Tighten the wing bolts (2) (3 places) evenly to fix
the cover.
6.
Set the grease pump lock plate (D) on the grease pump,
and tighten it by hand until the bolts (B) and the washers
(E) (2 places each) are closely fitted each other.
7.
Tighten the bolts (B) (2 places) by using the tool until the
nut (A) is closely fitted to the block (C) (tightening torque
after tightening approximately 2 turns: 9.8 to 19.6 Nm {1 to
2 kgm}).
8.
Restore the hose (5) for grease pump and the wiring (6) to
the original positions.
Turn on the power supply for the grease pump now.
9.
The air inside the pump is mixed in the grease, and it
makes the grease cloudy. The following air bleeding work
is necessary.
10. Loosen the check valve (7) in order to discharge all the
grease which the air is mixed in through the hole (a) under
the check valve (7).
11. Close the check valve (7) securely after finishing the air
bleeding.
12. After discharging the air from the grease pump, pull the
lever of the grease gun to discharge all the air-mixed
grease from the hose and the grease gun.
• When adding grease, be extremely careful that the suction part and the follower plate (4) of the grease
pump are free from sand or dust.
• The follower plate (4) may not be set correctly if the grease pump does not discharge the grease even
though it has adequate amount of grease. Set the follower plate (4) correctly.
• Standard type of the grease can is 18 ℓ . More grease will be left if 20 ℓ can is used.
• If the 20 ℓ can is used, the height of the grease can is too high. Remove the spacer (F), and insert it
between the double nut (A) and the plate (D).
• Adjust the height of the double nut (A) to the position where it matches to the height of the 20 ℓ can.
Then tighten the double nut (A).
(Tightening torque for the nuts: 98 to 123 Nm {10 to 12.5 kgm})
OPERATION EXPLANATION OF COMPONENTS
3-109