Click here to make tpub.com your Home Page

Page Title: FIFTH WHEEL DOESN'T LIFT (Cont)
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

TM 9-2320-285-24-1
2-76. FIFTH WHEEL HYDRAULIC SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. FIFTH WHEEL DOESN'T LIFT (Cont)
Step 5.
Check hydraulic pump suction hose for restrictions (blockage, sharp bends).
Remove hose if necessary (para 2-78b(2)).
WARNING
Compressed air must not exceed 30 psi. Wear safety glasses when
using compressed air. Failure to do so could cause serious injury to eyes
and possible blindness. If you hurt your eyes or if a foreign object is
blown into your eyes, seek medical aid immediately.
a. If hose is blocked, use compressed air (30 psi maximum) to remove blockage; if hose remains
blocked, replace (para 2-78b(2)).
b. If hose is not blocked, go to step 6 below.
Step 6.
Check all fifth wheel lines, hydraulic control valve, and hydraulic cylinders for visible signs of large oil
leaks.
a. If large oil leaks are seen, repair as necessary.
b. If no large oil leaks are seen or if fifth wheel hydraulic cylinders or hydraulic control valve require
repair, notify direct support maintenance.
2. FIFTH WHEEL LIFTS SLOWLY
Step 1.
With vehicle engine idling, raise fifth wheel boom; clock lifting speed.
Then lower fifth wheel,
accelerate engine to 2000 rpm, and clock lifting speed.
a. If lifting speed increases with increase in engine speed, operation is normal.
b. If lifting speed does not increase, increases only slightly, or remains slow with increase in engine
speed, go to step 2 below.
WARNING
Do not remove filler cap when hydraulic oil is hot. Hot oil can cause
severe injury.
2-863

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business