Komatsu PC130-8, Руководство по ремонту

Страница: 41 / 1043

00 Index and foreword SEN03766-02
PC130-8
27
2. Precautions when carrying out installation work
q
Tighten all bolts and nuts (sleeve nuts) to the specified (KES) torque.
q
Install the hoses without twisting or interference and fix them with intermediate clamps, if there are any.
q
Replace all gaskets, O-rings, cotter pins, and lock plates with new parts.
q
Bend the cotter pins and lock plates securely.
q When coating with adhesive, clean the part and remove all oil and grease, then coat the threaded por-
tion with 2 – 3 drops of adhesive.
q When coating with gasket sealant, clean the surface and remove all oil and grease, check that there is
no dirt or damage, then coat uniformly with gasket sealant.
q Clean all parts, and correct any damage, dents, burrs, or rust.
q Coat rotating parts and sliding parts with engine oil.
q When press fitting parts, coat the surface with anti-friction compound (LM-P).
q After fitting snap rings, check that the snap ring is fitted securely in the ring groove.
q When connecting wiring connectors, clean the connector to remove all oil, dirt, or water, then connect
securely.
q When using eyebolts, check that there is no deformation or deterioration, screw them in fully, and align
the direction of the hook.
q When tightening split flanges, tighten uniformly in turn to prevent excessive tightening on one side.
a
When operating the hydraulic cylinders for the first time after reassembling cylinders, pumps and other
hydraulic equipment removed for repair, always bleed the air as follows:
1)
Start the engine and run at low idle.
2) Operate the work equipment control lever to operate the hydraulic cylinder 4 – 5 times, stopping the
cylinder 100 mm from the end of its stroke.
3) Next, operate the hydraulic cylinder 3 – 4 times to the end of its stroke.
4) After doing this, run the engine at normal speed.
a
When using the machine for the first time after repair or long storage, follow the same procedure.
3. Precautions when completing the operation
1) Refilling with coolant, oil and grease
q If the coolant has been drained, tighten the drain valve, and add coolant to the specified level.
Run the engine to circulate the coolant through the system. Then check the coolant level
again.
q If the hydraulic equipment has been removed and installed again, add engine oil to the speci-
fied level. Run the engine to circulate the oil through the system. Then check the oil level
again.
q If the piping or hydraulic equipment have been removed, always bleed the air from the system
after reassembling the parts.
a
For details, see Testing and adjusting, “Bleeding air”.
q Add the specified amount of grease (molybdenum disulphide grease) to the work equipment
parts.
2) Checking cylinder head and manifolds for looseness
Check the cylinder head and intake and exhaust manifold for looseness.
If any part is loosened, retighten it.
q For the tightening torque, see “Disassembly and assembly”.
3) Checking engine piping for damage and looseness
Intake and exhaust system
Check the piping for damage, the mounting bolts and nuts for looseness, and the joints for air
suction and exhaust gas leakage.
If any part is loosened or damaged, retighten or repair it.
Cooling system
Check the piping for damage, the mounting bolts and nuts for looseness, and the joints for
coolant leakage.
If any part is loosened or damaged, retighten or repair it.
Fuel system
Check the piping for damage, the mounting bolts and nuts for looseness, and the joints for fuel
leakage.
If any part is loosened or damaged, retighten or repair it.