Check Of Engine Piping For Damage And Looseness; Testing And Adjusting Air Conditioner Compressor Belt Tension - Komatsu WA250-6 Shop Manual

110 Testing and adjusting, Part 1

Check of engine piping for damage and looseness

Check of engine piping for
damage and looseness
Air intake and exhaust systems:
Check the piping for damage, looseness of the
mounting bolts and nuts, and suction of air and
leakage of exhaust gas through the joints. If it
is loosened or damaged, retighten or repair.
Cooling system:
Check the piping for damage, looseness of the
mounting bolts and nuts, and leakage of water
through the joints. If it is loosened or dam-
aged, retighten or repair.
Fuel system:
Check the piping for damage, looseness of the
mounting bolts and nuts, and leakage of fuel
through the joints. If it is loosened or dam-
aged, retighten or repair.
WA250, 250PZ-6
Testing and adjusting air condi-
tioner compressor belt tension
1
Testing
Press the middle point between air conditioner
q
compressor pulley and drive pulley with a finger
and measure deflection (a) of the belt.
a Pressing force: Approx. 98 N {Approx. 10 kg}
a Standard deflection (a): 11 – 14.5 mm
Adjusting
a If the deflection is abnormal, adjust it according
to the following procedure.
1. Loosen compressor bracket upper mounting
bolts (1) and lower fixing nut (2).
2. Loosen locknut (3) and adjust the belt tension
by turning adjustment bolt (4).
3. After the tension is adjusted to the reference
value, tighten locknut (3), fixing nut (2) and
compressor bracket mounting bolts (1).
SEN03836-01
1
35
30-110