SERVICE PROCEDURE
MAINTENANCE
4-80
CHECKING FUNCTION OF ACCUMULATOR
4
For details of handling the accumulator, see Section “ACCUMULATOR (2-36)“.
PPC ACCUMULATOR
If the engine stops with the work equipment raised, and it is impossible to start the engine again, it is possible as
an emergency measure to actuate the valve with the oil pressure stored in the accumulator and lower the work
equipment to the ground.
1.
Apply the parking brake.
2.
Raise the work equipment to the maximum height, then
operate the lift arm control lever to HOLD position (b).
3.
Stop the engine.
4.
Leave the work equipment lock lever in the FREE position.
5.
Check that the area around the machine is safe, then turn
the starting switch to the ON position, set the lift arm con-
trol lever to FLOAT position (d), and lower the work equip-
ment to a point 1 m above the ground.
6.
When the lift arm comes to the 1m position, return the lift
arm control lever to LOWER position (c), and lower the
work equipment slowly to the ground.
REMARK
Carry out the check within 2 minutes after stopping the engine.
If the machine is left with the engine stopped, the accumulator
pressure will drop and it will be impossible to check the cause
of the problem.
If the work equipment stops while it is moving, the gas pressure in the accumulator has probably dropped.
Please contact your Komatsu distributor to have the accumulator inspected.
Replace the accumulator every 4000 hours or every 2 years.
Summary of Contents for WA800-3E0
Page 2: ......
Page 3: ...FOREWORD 11...
Page 27: ...SAFETY SAFETY LABELS 2 5 LOCATION OF SAFETY LABELS 2...
Page 66: ...GENERAL VIEW OPERATION 3 4...
Page 84: ...EXPLANATION OF COMPONENTS OPERATION 3 22 SWITCHES 3...
Page 224: ...TROUBLESHOOTING OPERATION 3 162...
Page 309: ...SPECIFICATIONS 15...
Page 330: ...HANDLING MACHINES EQUIPPED WITH VHMS ATTACHMENTS OPTIONS 6 20...
Page 331: ...INDEX 17...
Page 332: ...INDEX 7 2...
Page 335: ...COLOPHON 18...
