WEICHAI WD10 Service Manual - page 150
Service Manual for WD10 Diesel Engine
140
4) Insufficient cooling of air compressor.
5) Too much unclean matter in gasholder.
6) Long-running of air compressor.
7) High pressure in engine crankcase.
8) High engine oil pressure.
9) Deteriorated engine oil.
10) Defective air compressor.
Troubleshooting:
1) Check air compressor filter for damage and flaw, check whether the filter element is clean,
replace the damaged parts; check whether air compressor intake pipe is twisted or deformed,
ensure the intake pipe inner diameter meets the minimum requirements.
Table 1 Minimum inner diameter requirements for intake pipe and intake pipe joint
Theoretical
air
displacement
(m
3
/h)
Joint
inner
diameter (mm)
Pipe joint inner
diameter (mm)
Pipe
inner
diameter (mm)
Pipe
length
(mm)
≤17
Φ14
Φ14
Φ18
≤500
>17~
Φ16
Φ16
Φ20
>20~
Φ18
Φ18
Φ22
>30~
Φ20
Φ20
Φ24
>40~
Φ22
Φ22
Φ26
>50~
Φ24
Φ24
Φ28
Note: Theoretical air displacement Q
0
=
π
Piston displacement
n
Piston quantity,
where n is compressor rated speed.
2) Ensure the exhaust pipe inner diameter meets the minimum requirements.
Table 2 Minimum inner diameter requirements for exhaust pipe
Air compressing system
Load
Pipe
Pipe
Single cylinder air compressor (Standard load cycle)
≤25%
≥3.6m
13m
Single cylinder air compressor (Heavy load cycle)
25~35%
3.6~4.6m
16m
Double-cylinder air compressor (All load cycle)
≤35%
≥4.6m
22m