Alamo RHINO 95C Benutzerhandbuch

F-4145   01/11

Maintenance Section 5-5

© 2011 Alamo Group Inc.

Hydraulic troubleshooting material presented in this section
is offered as a guide to diagnosing probable causes and
remedies for general operational problems.

Match your problem wiht the typical problem examples
given in the possible cause column. These numbers
correspond with the possible cause and correction
paragraphs that follow.

Machine fails to operate 

when initially started.

1, 2, 5, 7, 15, 23

Machine looses power after 

initially operating 

satisfactorily.

1, 8, 10, 15, 23

Loss of power in lift or crowd 

cylinder, but other cylinders 

function properly

22, 24, 28

Loss of power in any one 

cylinder including lift and 

crowd

8, 9, 10, 11, 12, 13, 22, 

23, 25

Loss of power or loss of 

cushioning action in swing 

cylinders, but other cylinders 

function properly.

8, 9, 10, 11, 12, 13, 22, 

23, 25

Maximum swing action 

cannot be obtained.

12, 14

Slow operation of machine 

(lack of power) all cylinders.

1, 4, 6, 15, 23

Spongy or jerky action of 

cylinders and/ or noisy 

operation.

1, 3, 4, 5

Lift crowd or bucket cylinders 

drop under load when lever 

spools are shifted from 

neutral.

26, 28

Load drops or settles.

8, 10, 13, 25, 26

Leaky cylinders.

10, 11, 12, 13

Leaky valve.

8, 15, 16, 27

Sticky valve spool.

16, 19, 20, 21

Unable to push valve spool 

in.

16, 17, 20, 21

Spring centered spools do not 

return to neutral.

16, 17, 18, 19, 20, 21

1

Low oil level in 

reservoir.

Fill reservoir to proper 

level.

2

No oil supply to 

machine.

Engage tractor PTO.

3

Air in system.

Purge all circuits of air by 

operating all cylinders 

through full movements 

several times. Check oil 

in reservoir for foaming. 

Check all suction lines for 

leaks. Fill reservoir to 

correct level.

4

Oil viscosity too 

heavy or oil is not at 

operating 

temperature.

Use recommended 

hydraulic fluid. Run 

machine until it reaches 

operating temperature.

5

Pump not running.

Check PTO to be sure it 

is engaged. Pump 

connected to PTO.

6

Insufficient pumping.

Advance engine throttle.

7

Improper hose 

connection.

IMPORTANT: Be sure 

inlet and return hoses are 

hooked up correctly. 

Improper hookup will 

result in damage to 

backhoe valve.

8

Loose hydraulic 

connections, leaks 

in fittings or hoses.

Tighten all hose 

connections and replace 

all damaged o-rings at 

leaking o-ring fittings. 

Check and replace any 

damaged hoses.

9

Restriction in fittings 

or hoses.

Check and replace any 

damaged hoses and 

fittings. Check for pinched 

hoses.

10

Oil is bypassing 

cylinder piston.

Replace or rebuild 

cylinder. Replace 

damaged parts.

11

Scored piston rods 

or worn rod guides 

in cylinder.

Replace or rebuild 

cylinder. Replace 

damaged parts.

12

Bent piston rod in 

cylinder

Replace or rebuild 

cylinder. Replace 

damaged parts

13

Worn or damaged 

rod seals on 

cylinder. External 

leaks.

Re-pack cylinder. Rebuild 

cylinder replacing 

damaged parts as 

necessary.

14

Swing linkage 

jammed.

Remove interference.