Allowable tolerances
Limits
Turbocharger compressor 120 in. lb
Blower speed (ratio)- ................3.65 to 1
cover and turbine housing
Water pump peed (ratio) ..........3.65 to 1
band clamp bolts.
Air box pressure at 1,800 .........6.4 to 7.8 psi
Turbocharger to manifold
36-44 ft lb
bolts (using antifreeze
(2)
Engine model DS33TA.
compound).
Vibration dampener bolt ........65-85 ft lb
Alternator belt tension @ 25 Will depress in.
Water pump impeller retain 50-55 ft lb
lb pressure.
ing nut.
Fan belt tension @ 25 lb
Will depress in.
pressure.
g. Adjustment Data.
Fuel injection pump timing 11
(1) Engine model 687C-18-ES.
(BTC).
Fuel injection pump timing
Allowable tolerances
Limits
dimensions:
Off engine. .........................4.2675 + .002 in.
Transfer pump pressure
110 to 120 lb
80 lb
On engine. .........................4.2255 + .002 in.
at 1,800 rpm.
Turbocharger, clearance be 018-.022 in.
Injector pop pressure in psi 2,200 to 2,250 psi 2,000 psi
tween Impeller and bearing
(pounds per square inch).
housing.
Compression pressure
325 to 400 psi
250 psi
Valve clearance:
cranking speed at 150-200 rpm
Exhaust (hot ...................... .025 in.
-maximum variations of
Exhaust (cold) ................... .028 in.
30 psi between any two
Inlet (hot) ........................... .015 in.
cylinders on engine.
Inlet (cold) ........................ .017 in.
Injection pump timing drive 26 BTC +1
(before top
h. Fuel Injection Pump Torque Data (Engine Model
center)
687C-18-ES).
Pump timing
16 BTC -1
Lift at push rod
0.008 at 86
Transfer pump rotor .....................
70-75 in. lb
ATC (after top
Drive hub screw ..........................
400-500 in. lb
center)
Drive sprocket .............................
95 in. lb
Lift at exhaust valve
0.012 at 86
End plate screws.- .......................
36-39 in. lb
ATC
Oil pressure at 1,800 rpm
.52 to 80 psi
40 psi
Oil pump capacity
44 gpm
Oil pump speed---
2,743 rpm
lists
manufacturer's
sizes,
tolerances,
desired
Oil pump premier relief
65 psi
clearances, and maximum allowable wear and
valve setting.
clearances for engine model D333TA. Table 1-2 lists
Fan speed
2,300 rpm
standards for engine model 687C-18-ES.
Water flow
90 to 120 gpm
(dependent on
ambient temperature)
Table 1-1. Engine Repair and Replacement Standards
For Engine Model D333TA
Manufacturer's dimensions
Desired clearance
Maximum
Component
and tolerances in inches
allowable wear
Min
Max
Min
Max
or clearances
Accessory Drive :
Backlash between accessory drive and accessory
drive idler gear ..............................................
0.002
0.014
Backlash between accessory drive idler gear and
camshaft gear ................................................
0.002
0.014
Idler gear and clearance .......................................
0.002
0.009
------------
------------
0.014
Idler gear bearing base .........................................
1.000
1.003
Idler gear bearing clearance .................................
0.001
0.005
------------
------------
0.007
Belt tension (slack at point) midway between pulleys
@ 25 lb ..........................................................
------------
0.500 in.
Camshaft
Backlash between cam-shaft gear and crank-shaft
gear ..............................................................
0.001
0.013
Bearing journal diameter ......................................
2.8105
2.3115
Bearing clearance .................................................
0.0025
0.0055
------------
------------
0.007
End clearance.......................................................
0.004
0.010
------------
------------
0.017
AGO 20051A
1-3
