Gradall LOED 534A Service Manual - Manual (Page 68)

Visually inspect all parts. There
will be a gear track on the inside
of the motor body. Measure the depth
of this gear track. The nominal
depth of this cut is .008" (0,203 MM)
and should not exceed .015" (0,381 MM).
If the track is less than .015", the
body is acceptable for assembly pro-
viding it is not cracked or otherwise
damaged.
Examine the pressure plates. They
should not show excessive wear on
the bronze side. If deep curved wear
marks are visible, replace the plates.
Examine the gears. If excessive wear
is visible on the journals, sides, or
shaft where it rotates in the seal,
replace both gears.
I f any of the internal parts show
excessive wear, replace them with
new parts.
For further information on inspec-
tion of parts, see applicable por-
tions of PUMP TROUBLESHOOTING GUIDE,
or DIAGNOSING TYRONE GEAR PUMP
FAILURES.
INSPECTION OF VALVE PART
Visually inspect the valve spool for
scratches and burrs.
Examine the spring for cracks and
breaks.
Examine the valve spool bore in the
valve body for scratches and burrs.
Burrs or minor scratches can be
removed with Number 400 Grit (only)
Emery Cloth.
The check valves are integral with
the body in which they are located
and cannot be visually checked, but
it is highly unlikely they will ever
cause trouble.
I
Put o-rings (40) on plugs (39) and
install each in its proper
place. 5 8 .
2.
3.
4.
5.
1.
2.
3.
4.
INSPECTION OF MOTOR PARTS
68
1.
In stall a piston (27) and spring
(32) in each piston bore. (Fig. 107) 57.
FIGURE 107