Maintenance – Servis-Rhino 95HD User Manual

Page 36

INSTALLING SC SPOOL POSITIONER KIT (Item 2)

AND FLOAT POSITIONER KIT (Item 5)
1. Remove socket head cap screws and bonnet from

section.

2. Remove spool from section. Follow instructions in

Spool Seal Removal section except do not remove

seals.

3. Replace parts in spool positioner kit.
NOTE: Spool screw on end of spool is loctited in place. Do

not replace unless it is damaged. If spool screw must be

replaced, refer to Replacing Spool Ends Section.
4. Replace spool in section. Refer to instructions in

Spool Seal Installation section.

5. Replace bonnet and socket head cap screws.

REPLACING SPOOL ENDS - CENTER TWO

SECTIONS
Spool extensions (handle end) are installed at the factory

using Loctite 262. Spool screws (positioner end) are

installed at the factory using Loctite 242. Do not replace

them unless they are damaged. Use following procedure

to replace them.
1. Remove spool from section. Follow instructions in

Spool Seal Removal Section except do not remove

seals.

2. Clamp spool using vice grips on land section of spool

not machined for valve bore.

3. Unscrew damaged end.

NOTE: Heat may be applied to loosen Loctite.

4. Clean threads with Loctite Primer and install using

Loctite 262 for handle ends and Loctite 242 for

positioner ends.

5. Replace spool in section. Refer to instructions in

Spool Seal Installation section.

MAINTENANCE

F3788-7-04

Maintenance Section 5-8

OUTLET PORT

3/4-16 O.R.
MACHINED TO

ACCEPT POWER

BEYOND SLEEVE

OUTLET

SECTION

PORT RELIEF

2650 PSI

PRESSURE

O-RINGS

EXHAUST

O-RING

LOAD

CHECK

EXHAUST

O-RING

6B: ROD END DIPPERSTICK CYLINDER

6A: BASE END DIPPERSTICK CYLINDER

5B: ROD END BUCKET CYLINDER

5A: BASE END BUCKET CYLINDER

4B: BASE END RIGHT STABILIZER CYLINDER

4A: ROD END RIGHT STABILIZER CYLINDER

3B: BASE END LEFT STABILIZER CYLINDER

3A: ROD END LEFT STABILIZER CYLINDER

2B: ROD END LEFT SWING CYLINDER

2A: ROD END RIGHT SWING CYLINDER

1B: BASE END BOOM CYLINDER

1A: ROD END BOOM CYLINDER

FLOW DIRECTION

PORT RELIEF

W/ ANTI CAVITATION

2650 PSI

PILOT

OPERATED

LOCK VALVES

(TOP AND

BOTTOM)

PORT RELIEF

W/ ANTI CAVITATION

2650 PSI

FLOAT

SECTION

PORT RELIEF

3500 PSI

PORT RELIEF

2650 PSI

MAIN RELIEF

2500 PSI

OUTLET PORT

3/4-16 O.R.

INLET PORT

3/4-16 O.R.

INLET

SECTION

RELIEF VALVE CARTRIDGE TABLE

Relief

type

Location Function

PSI How to test

Main

Port
relief

2500

3500

2650

Inlet
section*

Section 1,
A port*

Section 1,
B port*

Section 2,
A & B
ports*

Section 5,
A port*

Protect all
functions of
backhoe

Protect
backhoe from
bucket digging
induced loads

Plug gauge
directly into
stabilizer work
section and
operate stabilizer

A porta-power
with an oil
pressure guage
is required.
Install porta-
power pressure
hose directly
into working port
of relief to be
checked.
Pressurize
porta-power and
observe
maximum
pressure
attained. Port
reliefs should
“crack” at or
down to 200 PSI
below specified
relief setting.

Protect
backhoe from
bucket digging
induced loads
Protect swing
cylinder circuit
from shock
loading
Protect
backhoe from
bucket digging
induced loads

Port
relief

2650

Section 6,
A port*

Protect
backhoe from
bucket digging
induced loads