54
and don’t contaminate or damage parts.
(a) Clamp flange shell of pump by bench vice
(b) Screw off bolt 11, rear end cover 5 and pump body 1.
(c) Dismantle lining slice 6, drive gear 2 and driven gear 3.
(d) Dismantle seal 7 and retainer ring 8 from front and rear end cover.
Notice: if don’t renew seal, please do not remove it from front end.
(2) Inspection
Use gasoline to clean parts (except rubber parts).
(a) Pump body inspection
If contact length between pump body and gear is more than 1/2 circumference, please
replace pump body.
Figure 2-62 figure 2-63
(b) Lining slice inspection
Check interface of lining slice, if surface damage or thickness of lining slice is less than
normal value
：
4.94mm, please replace it.
Figure 2-64 Figure 2-65
(c) Front and behind pupm cover
If colour changing(brown)extent of inner surface lining sleeve is more than 150°, please
replace it.
(d) Check drive wheel and driven gears
If abrasion badly, to replace a pair. If D is less than normal, replace two pair.
Figure 2-66
(e) If necessary, renew seals, lining sleeve seals, retainer ring, oil seal, clip ring.
(3) Assembling
(a) Fit a new seal and a new spacer ring.
oil-in
oil-out
lining board
groove
side of outlet port
side of inlet port
12.7
(0.5)
12.7
(0.5)
D
D
