Repair Information 11. Remove the wear plates (4) from front plate (7) and
Wo
rkin a clean area, cleanlinessis extremelyimportant
when repairing hydraulic pumps. Before disconnecting
thelines, clean port area of pump. Disconnect hydraulic
lines, removing pump assembly from vehicle and plug
ports. Thoroughly clean the outside of pump. After
cleaning then remove port plugs and drain oil.
Disassembly
1. Scribe
a line, at an angle, across front plate (7), bo-
dies (2), adapter plate (16) and backplate (21). This will
assure proper reassembly.
NOTE: To m
aintain maximum pump efficiency, keep
body, gears and wear plates for each section together.
DO NOT mix parts between different sections.
2. Cla
mp pump in vise, shaft end up.
3. Remove t
he eight cap screws (9).
4. Remove pump f
rom vise, hold pump in hands and
bump shaft against wooden block to separate pump
sections. Front body (2) willremain with either front plate
(7) or adap
ter plate (16).
5. Pla
ce front idler gear (13) back into gear pocket and
tap protruding end with soft face hammer to remove
front body (2) from the front plate (7) or adaptor plate
(16).
6. Remove adapter p
late (16) from body (2) by tapping
on the adapter plate with a plastic hammer or rawhide
mallet.
7. Remove backpla
te (21) from body (2) by tapping on
backplate with plastic hammer or rawhide mallet.
8. Remove r
ear idler gear (13), slip fit gear (14) and key
(15).
9. Remove driv
e gear assembly (3) from adapter plate
(16).
10. Pla
ce rear idler gear (13) back into gear pocket and
tap protruding end with soft face hammer to remove rear
body (2) from the backplate assembly (21) or adaptor
plate (16).
adapter p
late (16).
12. Remove o--ring
s (1) from front plate (7), adapter
plate (16), and backplate (21).
13. Remove backup gaskets (
5) and balance pressure
seals (6) from front plate (7) and adapter plate (16) by
prying out with a sharp tool.
14. Remove s
haft seal (10) and washer (11) from front
plate (7) by prying with a screw driver. Be careful not to
damage seal bore.
15. Remove r
elief valve (20) from backplate assembly
(21).
16. Remove O
--ring (17), backup washer (18), and O--
ring (19) from relief valve (20).
Inspect P
arts for Wear General
1. Clean
and dry all parts.
2. Remove nicks and
burrs from all parts with emery
cloth.
Gear A
ssembly Inspection
1. Check spline
drive shaft for twisted or broken teeth.
Also check for damaged keyway, on drive shaft, that
drives the slip fit gear of the rear pump.
2. Inspect bo
th the drive gear and idler gear shafts at
bushing points and seal area for rough surfaces and ex-
cessive wear.
3. Repla
ce gear assembly if shaft is worn in bushing
area. (One gear assembly may be replaced separately;
shafts and gears are available as assemblies only. The
slip fit gear is available separately).
4. Inspect gear f
ace for scoring and excessive wear.
5. Assure t
hat snap rings are in grooves on either side
of drive and idler gears.
6. If edge
of gear teeth are sharp, break edge with
emery cloth.
licHydrau
System
Groundsmaster 455--D
Page 4 -- 39.2
Rev.
C
Repairs
To Next Page
Loading...
