Alamo RHINO 95C Manual Do Utilizador

F-4145   01/11

Maintenance Section 5-6

© 2011 Alamo Group Inc.

30. This valve is a precision device and is not intended for
extensive field adjustment or repair. Field replacement
parts are limited to seal kits, cartridges and tie rod ends.
Beyond replacement of these parts, opening of check
cavities and certain relief valve cavities to examine for
trapped dirt, or resetting main relief valve with the use of a
good pressure gauge, valve should be returned for service.

Dirt and shreds of packing material are the usual causes of
valve malfunction. Be sure that oil supply is kept clean. Use
only factory supplied packings in cylinder repair. Fittings
and hoses must be clean before being removed.

Troubleshooting guide is designed to help qualified
individuals, with valve service training, correct minor
problems which may develop. If valve is under warranty do
not attempt disassembly for repairs. Contact your
authorized dealer. Any attempt to disassemble valve during
warranty period will VOID warranty.

15

Excessive back 

pressure.

Restriction between “in” 

and “out” port and 

reservoir.

16

Paint on valve spool. 

Sticking valve spool, 

or scored valve.

Clean valve spool. 

Binding may be caused 

by over tightened plug, 

mounting bolt, fitting or tie 

rod bolt. See Item 30.

17

Oil leakage past 

spool seal into spool 

cap.

If spool cap contains oil, 

replace spool seal o-ring. 

If o-ring retainer is 

“bellied”, check for 

restriction from “out” port 

reservoir. See Item 30.

18

Broken return 

springs.

Replace broken return 

springs.

19

Bent spool.

Return for factory repair 

or replace with new spool 

section. See Item 30.

20

Foreign particles.

Clean system and valve.

21

Misalignment of 

control handle 

linkage.

Check linkage for binding 

condition.

22

Spool not moved to 

full stroke.

Spool travel should be 

5/16” either way or 5/8” 

total.

23 Relief 

valve 

setting 

in control valve too 

low or defective.

Clean or overhaul relief 

valve or replace cartridge. 

Refer to VALVE 

SERVICE section for 

proper PSI settings.

24

Overload relief valve 

in control valve 

stuck open or 

malfunctioning.

Clean relief. Do not 

disturb pressure setting 

or replace cartridge.

25

Worn control valve.

Replace control valve.

26

Check poppet in 

control valve not 

holding.

Clean check poppet(s) 

carefully. Ensure free 

movement and proper 

seating or replace check 

poppet. See Item 30.

27

Damaged or worn 

spool seals.

Replace spool end seals.

28

Check ball in anti-

cavitation is stuck or 

not seated properly.

Clean anti-cavitation 

valve carefully. Assure 

that checks move freely 

and seat properly or 

replace cartridge. See 

Item 30.

29

Valve cap and 

center return 

mechanism binding.

Loosen screws holding 

cap on valve (ref. Valve 

Service image). Operate 

valve spool and retighten 

screws.