Komatsu Galeo PC800-8, Shop Manual

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18
PC800, 850-8
SEN00912-02
30 Testing and adjusting
3. Measuring leakage from bucket cylinder
1) Run the engine and curl the bucket to the
stroke end.
k
Referring to “Release of residual pres-
sure from hydraulic circuit”, release the
residual pressure from the piping on the
bucket cylinder head side (Operate the
lever only in the CURL direction, how-
ever).
2) Disconnect hose (3) on the cylinder head
side and block it with a flange.
k
Take care not to disconnect the hose on
the cylinder bottom side.
a
Use the following part to block the hose.
07379-01470 (Flange #14)
3) Run the engine at high idle and relieve the
bucket cylinder by operating the bucket con-
trol lever in the CURL direction.
k
Take care not to operate the bucket
control lever in the DUMP direction.
4) Start measuring the oil leakage 30 seconds
after the bucket cylinder is relieved and
measure for 1 minute.
5) After finishing measurement, return the
parts.
4. Measuring leakage from swing motor
1) Disconnect drain hoses (4) and (5) and plug
them.
a
Use the following parts to block the hos-
es.
07376-70522 (Plug #05)
• (4): Drain hose of front swing motor
• (5): Drain hose of rear swing motor
2) Turn the swing lock switch ON.
3) Run the engine at high idle and relieve the
swing circuit and measure the oil leakage.
a
Start measuring the oil leakage 30 sec-
onds after the swing motor circuit is re-
lieved and measure for 1 minute.
4) After measuring 1 time, swing the upper
structure 180° and measure again accord-
ing to steps 2) and 3).
5) After finishing measurement, return the
parts.