Clean Transmission Case Breather - Komatsu WA500-6H Operation & Maintenance Manual

Maintenance
12. Loosen butterfly nut (4) holding the lever of the priming
pump.
13. Operate the lever of the priming pump to prime with fuel.
Fuel will come out from plug (3) at the top of the fuel filter
head. Continue priming slowly until no more bubbles come
out with the fuel. Fit sealing tape to plug (3), then tighten it.
14. Continue priming a further 1 - 2 times. Check that fuel comes
out from plug (2), then tighten plug (2).
15. Loosen air bleeder (5) of the supply pump and the operator
the priming pump to prime with fuel.
Fuel will overflow from air bleeder (5). Continue priming until
no more bubbles come out with the fuel, then tighten air
bleeder (5).
Tightening torque:
4.9 to 6.9N·m {0.5 to 0.7kgf·m, 3.6 to 5.1 lbft}
NOTE
Do not use feed pump (6) supplied with the supply pump.
16. Carry out priming a further approx. 20 times, then securely
tighten wing nut (4) holding the lever of the priming pump.
Tightening torque:
11.8N·m {1.2kg·m, 8.7lbft}
17. After replacing the filter cartridge, start the engine and check
for any leakage of fuel from the filter seal surface. If any
leakage of fuel is found, check the tightening of the filter car-
tridge. If there is still leakage of fuel, repeat Steps 1 - 3 to
remove the filter cartridge. If there is any damage or embed-
ded material in the packing surface, replace the cartridge
with a new part and repeat Steps 4 -17 to install.

Clean transmission case breather

1. Stop the engine and wait for the temperature at all parts to
go down.
2. Remove all mud and dirt from around the breather.
3. Remove the breather and fit a cover to the breather mount-
ing hole to prevent dirt from entering.
4. Soak the breather in flushing liquid and wash it.
5. Install the breather.
WA500-6H – VEAM430100
4.9 Service procedure
Every 1000 hours service
4
GK050249
5
6
GK050250
GK050251
4-73