Mitsubishi 4DQ50 Service Manual page 99

Limit of Use Remedies
Remarks
not below 150kg/c:n z
Re~lace
plunger ass'y Use good de
I ivery valve. Put a
pressure gauge of 300-400k~
em z , set uck at small injection
+0.15
rate and. running pump at 200
r. p.m., read the gauge.
A
0.1
reading above
1S0k~CDlZ
is
satisfactory.
-0.5
0.25
•
Use good plunger. Set pressure
not Jess than 5 sec. Replace delivery valve ass Y at1S0k~anzand
bring control
rack to non-injection position
(Com) to see how soon it will
drop
10k~em~
If it takes
-1
longer than 5 sec •• oil-tight-
ness is satisfactory.
Tappet clearance:more than 3.
Conditions) Nozzle tips: ND-DN40SDND32
Making it inject into open air
on injection pamp tester.
Injection pipes:
~1.6~600
Injection pressure: 120
k~cmz
De
I
ivery pressure: 2.0
k~anz
Test oil: JIS No.2 gas oil
Running injection
600 r.p.m.
pump at
Main spring
-'(
....
-)"'~
....-'
.lillllllll
P )
~~
-
Shim(B)
'/1
Shim(A)
- 91-