Chrysler RAM TRUCK 2500 1994 Service Manual page 834

9309-70
Fig. 8 Measuring inner Rotor Thickness
Slide outer rotor into timing chain cover pump
body. Press rotor to the side with your fingers and
measure clearance between rotor and pump body
(Fig. 9). I f clearance is 0.19 mm (0.007 inch) or more,
and outer rotor is within specifications, replace tim­
ing chain cover.
Install inner rotor into timing chain cover pump
body (Fig. 10). Inner rotor should be positioned with
chamfer up or toward engine when cover is installed.
This allows easy installation over crankshaft. I f
clearance between inner and outer rotors is 0.150
mm (0.006 inch) or more, replace both rotors.
Place a straightedge across the face of the timing
chain cover pump body, between bolt holes (Fig. 11).
I f a feeler gauge of 0.077 mm (0.003 inch) or more
can be inserted between rotors and the straightedge,
and the rotors are within specifications, replace tim­
ing chain cover.
Fig. 10 Measuring Inner Rotor Clearance in Cover
FEELER
G A U G E
STRAIGHT
EDGE
9 3 0 9 - 7 3
Fig. 11 Measuring Clearance Over Rotors
Inspect oil pressure relief valve plunger for scoring
and free operation i n its bore. Small marks may be
removed with 400-grit wet or dry sandpaper.
The relief valve spring has a free length of approx­
imately 49.5 mm (1.95 inches). The spring should