Gradall 534D-6T Service Manual - Manual (Page 261)

F ORM N O. 29813 • I MPLEMENT C IRCUIT P ERFORMANCE C HECKS (C & D Series Material Handlers)
H
YDRAULIC
F
ILTER
C
ONDITION
NOTE!
If the hydraulic filters have
more than 1000 hours on them,
change them.
NOTE!
The long filter for suction
(Gradall P/N 9114-3144) also
fits in place of the short return
filter (Gradall P/N 9108-4021).
Only Gradall Hydraulic
Filters meet or exceed the
filtration requirements of
the Gradall Material
Handler Hydrostatic Drive
and Hydraulic Implement
Systems. If any other type
of filter is installed on the
machine, change it
immediately and sample
the oil. Have the sample
analyzed by a reputable
test lab.
Remember! Failure to
use Gradall Filters may
void warranty!
WARNING !
2.0
FILTER RESTRICTION INDICATOR
• SET UP
1. With the park brake engaged and the transmission in “Neutral”,
start the material handler.
2. Warm the hydraulic oil to 100°F by stalling the “Crowd-In”
function at full engine speed.
• CHECK
1. After the hydraulic oil reaches operating temperature (minimum
100°F), check the condition of the hydraulic filter. You will need an
assistant.
2. While one of you sits in the cab running the engine at full throttle
(2500 RPM), the other one must check the Filter Restriction Indicator.
The indicator is located on the right side of the machine, on the
Filter Manifold.
3. Make sure the indicator does not show “Bypass” with the engine
running at full throttle.
• ADJUST
1. If the Indicator shows filter bypass, replace the suction and
return filters.