25
CHAPTER 3. ENGINE
5. COMPRESSION AND UNLOADED IDLING
SPEEDS
5.1. Inspection of compression
1) Remove the injection pipes.
2) Remove a injection nozzle.
Note:
Cap the injection nozzles, injection pump, and
injection pipes to avoid dust.
3) Install a compression gauge using an adaptor.
Fig. 3-14
4) Activate the starter and measure the compres-
sion.
kg/cm
2
at 300 rpm
Standard Limit Difference
between cylinders
30 26 3
Note:
• Use a fully charged battery.
• Be sure to remove the fuel pipes in advance to
avoid fuel injection.
• Remove only the nozzle for the cylinder whose
compression is to be measured. Other nozzles
should be left installed.
Caution:
When cranking the engine, take care not to
touch rotating parts.
5.2. Inspection and adjustment of the idling
speeds
1) Check for idling speeds.
Specified value 1250 rpm
2) When the measured value deviates from the
specified value, correct with an adjusting
bolt.
Fig. 3-15
6. INSPECTION OF WATER PUMP
6.1. Inspection of the pump and pulley
Check the pump for noise or hitching by turning
the water pump pulley, applying load vertically
to the pump axis.
When noise or hitching occurs, replace the pump
assembly.
Fig. 3-16
To Next Page
Loading...
Need help?
General
