PS Magazine - TB 43-PS-643
PS, The Preventative Maintenance Monthly
ISSUE 643
JUNE 2006
?
D8#976
-EC(#=9
7
HE RAMP ON AN -55@0SERIES VEHICLE IS HEAVY ENOUGH TO BEGIN WITH, MECHANICS. "UT AS MORE
ARMOR WAS ADDED, IT GOT A WHOLE LOT HEAVIER¡GOING FROM [bb TO 5,@bb POUNDS
L
7HILE THAT'S WITHIN THE WEIGHT LIMIT FOR THE RAMP PUMP¡8,Zbb LBS )¢ 58b LBS+¡THE EXTRA
WEIGHT WILL STRESS THE SYSTEM. 2AMP PUMP FAILURE, zUID LEAKS AND BROKEN WIRE ROPES DUE TO
RUST, ROUTING PROBLEMS AND DAMAGE ARE RIGHT AT THE TOP OF THE FAILURE LIST.
4HAT MAKES A GOOD 1-#3 EVEN MORE IMPORTANT. 6EHICLES WITH ADDITIONAL ARMOR SHOULD BE
INSPECTED MONTHLY. (ERE'S HOW_
dAMP 1UMP AND [YLINDER
=/
#HECK THE HYDRAULIC RAMP PUMP AND LINES
FOR LEAKS WHILE RAISING AND LOWERING THE RAMP.
2/
fITH THE HYDRAULIC RESERVOIR EMPTY,
REMOVE THE QUICK DISCONNECT zUID RETURN FROM
THE CONTROL VALVE TO THE zUID RESERVOIR AND
CHECK FOR BLOCKAGE. 2EPLACE IF DAMAGED.
7/
2EMOVE THE HIGH0PRESSURE SUPPLY HOSE
QUICK DISCONNECT FROM THE CONTROL VALVE TO THE
RAMP PUMP AND LOOK FOR BLOCKAGE. 2EPLACE
THE HOSE OR VALVES IF NECESSARY.
4/
2EMOVE THE REAR zOOR PLATES AND
MAKE SURE THE HYDRAULIC CYLINDER IS
SEATED PROPERLY. 4HE SHAFT SHOULD
ALSO MOVE FREELY IN THE CYLINDER.
>/
;OOK FOR BLOCKAGES IN THE
BREATHER HOSE AND HYDRAULIC
CYLINDER SUPPLY. 2EPLACE THE HOSE IF
IT'S DAMAGED.
6/
$OUBLE0CHECK TO MAKE SURE ALL
HOSES ARE CONNECTED, THEN RElLL THE
HYDRAULIC RESERVOIR.
fIRE dOPE
=/
-AKE SURE THE WIRE
ROPE IS ROUTED PROPERLY
OVER THE PULLEYS TO THE
CYLINDER WITH NO SLACK.
4HE PULLEYS AND HINGE
SHOULD NOT BE BINDING
OR RUSTED.
2/
/NSPECT THE WIRE ROPE
FOR NICKS, zAT SPOTS,
RUST, BROKEN STRANDS
AND OTHER VISIBLE SIGNS
OF WEAR AND CORROSION.
/F YOU SEE ANY RUST AT
ALL,
REPLACE THE WIRE
ROPE/
7/
;UBE THE WIRE ROPE
WITH A COAT OF WIRE
ROPE, EXPOSED GEAR
GREASE, >3> 95[b0bb0
[@b0\^5Z.
[AUTIONS
2EMEMBER TO OPEN THE HULL DRAIN PLUGS AFTER
PARKING THE VEHICLE. 4HAT DRAINS WATER OUT OF THE HULL
AND PREVENTS RUST. -AKE SURE YOU USE A DRIP PAN AND
DISPOSE OF THE CONTENTS IN AN APPROPRIATE CONTAINER.
>EVER ADD MORE WEIGHT¡LIKE HANGING EXTRA
SUPPLIES¡TO THE RAMP. %XTRA WEIGHT COULD EXCEED THE
PUMP'S PRESSURE LIMITS AND CAUSE PUMP FAILURE. aOU WILL
ALSO STRETCH THE WIRE ROPE TO A POINT WHERE IT CANNOT BE
ADJUSTED TO ALLOW THE RAMP TO CLOSE.
_YDRAULIC dESERVOIR
| 4AP THE BREATHER VALVE ON TOP
OF THE HYDRAULIC RESERVOIR. /T SHOULD
MOVE UP AND DOWN AS YOU PRESS
AND RELEASE IT. /F NOT, THE BREATHER IS
CLOGGED AND SHOULD BE CLEANED WITH
DRY CLEANING SOLVENT OR REPLACED.
| -AKE SURE ALL HOSES ARE
CONNECTED AND THE HYDRAULIC
RESERVOIR IS FULL. &LUID SHOULD BE
VISIBLE AT THE HALFWAY POINT IN
THE SIGHT GLASS WHEN THE RAMP IS
COMPLETELY
LOWERED.
-55@03ERIES &=6}
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WKRVH#DUH#
PRQWKO\
#
FKHFNV#
QRZ$
FDXWLRQ
#LV#WKH#
ZDWFKZRUG$
#HECK PUMP AND LINES FOR LEAKS
(YDRAULIC CYLINDER SEATED PROPERLY
A
4AP BREATHER
CAP TO CHECK
FOR CLOGS}
2OPE
ROUTED
PROPERLY
OVER
PULLEYS
A
/NSPECT WIRE
ROPE FOR
DAMAGE AND
CORROSION
}AND MAKE SURE zUID IS HALFWAY IN SIGHT GLASS
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