HYDROSTATIC PUMP (Cont'd)
Checking The High Pressure Relief Replenishing
Valves (Cont'd)
A
WARNING
When an engine is
running
in an enclosed
area, fresh
air
must
be added
to
avoid
concentration
of
exhaust fumes. If the engine
is stationary, vent
the
exhaust
outside
.
Exhaust fumes contain odorless,
invisible
gases
which
can kill
without
warning.
W-2050-1285
Connect the remote start switch MEL 1138A. (See
PREVENTIVE MAINTENANCE Section 1.)
Run the engine at
idle RPM. Engage the drive lever a
small amount. The pressure must reach
3500-4000
PSI
(24133-27580 kPa. DO NOT exceed 4000 PSI (27580
kPa).
Replace
the valves as needed.
Checking Charge Pressure (SIN 14999 & Below)
the tools listed will be needed to do the following
procedure:
MEL 1163
- Test Kit
MEL 1138A
- Remote Start Switch
Raise the QPerator cab.
(See PREVENTIVE
MAINTENANCE Section 1.)
Remove the temperature sender from the port
block [A).
Connect the
gauQe
(from the kit) to the port block in the
temperature sender port [B).
The pressure
should read
140-170
PSI (965-1172 kPa).
NOTE: Refer
to
the
Component
Repair Manual
for
the disassembly
and
assembly procedure.
Remove
~he
gauges. Install the switch and connect the
sender wire.
Checking Charge Pressure (SIN 15001 & Above)
The tools listed will be needed to do the following
procedure:
MEL 1173A
- Test Kit
MEL 1138A
- Remote Start Switch
Raise the QPerator cab.
(See PREVENTIVE
MAINTENANCE Section 1.)
Remove the switch from the
elbow on top of the
hydrostatic pump.
Connect the gauge (from the kit) to the fitting as shown
[C).
Connect the remote start switch MEL 1138A. (See
PREVENTIVE MAINTENANCE Section 1.)
Start the engine and run at full RPM.
The pressure should read
95-115
PSI (655-793 kPa).
NOTE: Refer
to
the
Component
Repair Manual
for
the disassembly
and
assembly procedure.
Remove the gauges. Install the switch and connect the
wire.
-3-12-
A
6-04938
B
6-04937
C
I 6-06923
A
WARNING
Diesel
fuel
or
hydraulic
fluid
under
pressure
can penetrate
skin
or
eyes, causing serious
injury
or
death. Fluid leaks
under
pressure may
not
be visible. Use a piece
of
cardboard
or
wood
to
find
leaks. Do
not
use
your
bare hand. Wear
safety goggles.
If
fluid
enters
skin
or
eyes, get
immediate medical
attention
from
a physician
familiar
with
this
injury.
W-2072-0496
741,742,743,
7430S Bobcat Loader
Service Manual
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