Isuzu NHR 4J Series, Workshop Manual

Page: 160 / 406

4JB1/4JB1T/4JB1TC/4JG2 – ENGINE 6A1 – 25
11. Idle Gear
12. Injection Pump
1) Remove the six injection pump bracket bolts
!
from
the timing gear case.
2) Remove the injection pump rear bracket bolts
"
from
the injection pump bracket
#
.
3) Remove the injection pump rear bracket bolts
$
and
the bracket
%
from the cylinder body.
4) Pull the injection pump along with the injection pump
timing gear free toward the rear of the engine.
NOTE:
Plug the injection pump delivery holder ports with the
shipping caps (or the equivalent) to prevent the entry
of foreign material.
13. Camshaft Timing Gear
1) Use a dial indicator to measure the camshaft end play.
This must be done before removing the camshaft
gear.
If the camshaft end play exceeds the specified limit,
the thrust plate must be replaced.
Camshaft End Play mm (in)
Standard Limit
0.050-0.114
(0.002-0.0044)
0.2 (0.008)
2) Remove the camshaft timing gear bolt from the
camshaft.
NOTE:
Hold the camshaft stationary to prevent the camshaft
from turning.
3) Use the universal puller
!
to pull out the camshaft
timing gear
"
.
Universal Puller: 5-8521-0002-0
4) Remove the thrust plate
#
.
14. Crankshaft Gear
6A1-25-1.tif
040LV002.tif
6A1-25-3.tif
6A1-25-4.tif