Maintenance
5556−1/A1
RT-flex58T-E
Winterthur Gas & Diesel Ltd.
7/ 10
4. Assembling of a fuel pump
4.1 Preparation
⇒ Clean all parts and check their condition.
Damaged parts must be replaced.
⇒ Check the lubricating oil bores in the housings and in pump cylinder 33 for free
passage using compressed air.
⇒ Replace all O-rings and rod seal rings.
K
4.2 Fitting the pump cylinder
⇒ Fasten upper housing 5 in vertical position onto a
work bench.
⇒ Carefully fit pump cylinder 33, aligning the groove in
the pump cylinder precisely with the bore provided
for holding screw 32 in the upper housing.
⇒ Screw in and tighten the holding screw together with
the Cu-ring.
Remark: There must be a clearance between holding
screw 32 and the groove base!
33
32
5
008.654/00
4.3 Fitting the pump cover
Remark: Thoroughly check the joint faces for cleanness
when fitting the valve block and the pump cover (Fig. ’I’).
⇒ Fit valve block 29 with the mounted and lubricated
O-rings 39 in upper housing 5. Then fit valve body
30 and compression spring 31 in the valve block.
⇒ Fit intermediate disc 34 with circlip 35 in the pump
cover.
⇒ Fit pump cover 4.
⇒ Apply Never-Seez NSBT-8 to the threads of the Al-
len screws 28. Tighten them: 1
ST
step HAND
TIGHT, 2
ND
step 40 Nm, 3
RD
step 80 Nm and 4
TH
step with 115 Nm providing the required sequence
for every step.
TIGHTENING
SEQUENCE
2013
Fuel Pump: Dismantling and Assembling
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