Paragraph
224
Fig. 23Q-Exploded view of hydraulic pump drive gear train. Pump (2) Is used for Multi-Power transmis
sion a/one and pump (2A) Is used when equipped with both Multi-Power and auxiliary hydraulics.
I Moun
h
y
d
ra
u
h
c
pump
11 Spacer
2 Auxiliary pump
5 Mounung
bracket
8 Thrust
washer
12. Bueh>ng
3. Snap nnR
6
Pump gear
9 Idler gear
13. Drive gear
4
Idler
aha!\
7
Snap ring
10 Needle roller
14.
Bracket
Fig. 231-Exploded view of hydraulic lift pump assembly. Safety relief valve (7) Is used on models not
equipped with pressure control valve.
1.
Valve levrr
2. Rear c:over
3. Gaaket
4 Intake mamf
o
l
d
6.
Filter houa1ng
6
F'Ht.er element
86
7.
Saf
e
t
y
relief valve
8. Gullet
9.
Rear
body
10.
8ualung11
II.
Piston yokes
12
Cam blocka
13.
Bearing
14. Carnahan
15
PistOn
rinp
16. Valve
chambers
17. Cam
follower
18 Front
body
19 Cap nut
20. Collar
21. Snap r
i
ng
22 Pln
23 0-.illator housing
24 Guide
25. Spnng
26.
Retainer
27.
Snap nng
28.
Sleeve waaher
29.
BacJc.up
waaher
30. "0'" r.ng
MASSEY ·FERGUSON
from each side of differential housing,
then pump package forward through
front opening of rear a
x
J
e
c
e
nt
e
r
housing.
NOTE: On some models with auxiliary
hydraulic system, It
Is
necessary to reposi
tion pump and remove elbow from top of
pump before pump assembly can be
withdrawn (Fig. 229).
The
gear train mounting plates serve
as pump support. Refer
to
Fig.
230.
Gear
train must be disassembled to remove
pump. Idler gear
(9)
contains
22
l
o
o
se
needle bearings
(10}.
Gear backlash is
not adjustable; renew parts concerned if
backlash exceeds
0.38
mm
(0.015
inch)
between any two gears. Tighten retain
ing bolts
to
a
torque
of
41-47
N
·
m
(30·35
ft..-lbs.).
224.
OVERHAUL.
To disassemble
the removed hydraulic pump, disconnect
the control lever pivot pin and remove
control lever (1-Fig.
231)
from valve
rollers
(33).
Remove rollers and pin
(32).
Remove filter
(6}
and housing
(5)
from
intake housing
(4).
Disconnect osciJlator
(23)
from cam follower
(17).
Remove cap
nut
(19).
Remove stud nuts, then
Fig. 232-E:xploded view of valve chamber and
associated parts showing poppet type Inlet and
outlet valves.
I
!'laton ring
2 Ptston
3 Chamber
4 "0" r1nga
5.
Inlet valve
6
Spnng
31 Control
valve
... y.
32 Pin
33 Roller
34
Locl<plate
35.
Spacer
36.
Adualilli
rod
7.
Outlet valve
8.
Spring
9.
"0" ring
10.
Beek-up
ri1111
11.
Plug
12.
S"•P
r�ng
37
Snap
nni
38. Wuhu
39.
Spring
40.
Oae
i
ll
a
to
r
rod
41.
Waaher
42.
"0" rillll
43.
Va
l
v
o
&
1leovo
Ul)'
