Gradall LOED 534A, Service Manual

Page: 45 / 91

C l e a n o u t s i d e o f p u m p t h o r o u g h l y.
M a r k t h e P u m p s e c t i o n s o n t h e s i d e
n e a r e s t t o t h e d r i v e s h a f t e x t e n -
s i o n s o t h a t t h e y c a n b e r e a s s e m b l e d
b a c k t o t h e o r i g i n a l r e l a t i o n s h i p .
(Figure 44)
Place pump in machinist vise
s e c u r e l y, s h a f t u p , u s i n g a c l e a n
b l o c k o f w o o d b e t w e e n t h e f l a t s o n
e a c h s i d e a n d t h e j a w s o f t h e v i s e .
T h i s k e e p s f r o r m a r r i n g t h e m a c h i n e d
s u r f a c e o f t h e p u m p a n d c a u s i n g
l e a k a g e a t t h e p o r t c o n n e c t o r s .
(Figure 45)
HYDRAULIC PUMP
Disassembly
Remove nuts (23) and washers from
s t u d s .
Remove pump from vise and set pump
o n b e n c h w i t h s h a f t e n d u p . C o a t
t h e s h a f t e x t e n s i o n w i t h c l e a n
g r e a s e . T h i s w i l l h e l p t o k e e p
from damaging the rubber sealing
s u r f a c e o f s h a f t s e a l w h e n s e a l i s
removed.
Lift the flange (4) off the pump,
keeping the flange as straight as
possible during removal. If the
flange is stuck, use a wood mallet
or plastic hammer and tap around
the edge to loosen it. (Figure 46)
1.
2.
3.
4.
5.
6.
45
FIGURE 44
FIGURE 45
FIGURE 46