PS Magazine - TB 43-PS-663
PS, The Preventative Maintenance Monthly
ISSUE 663
FEBRUARY 2008
48
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4AKE PREVENTIVE MEASURES TO MAKE SURE ALL TOW BAR COMPONENTS WORK. ESPECIALLY IN
UNUSUAL CONDITIONS[ >EMEMBER THE JOLLOWINGQ
u
)N DUSTY AND SANDY AREAS. REMOVE DUST AND SAND JROM TOW BAR COMPONENTS WHEN NOT
IN USE[ )J YOU DONbT. THAT COULD KEEP THE TOW BAR JROM MOVING LIKE IT SHOULD[
u
)N COLD WEATHER. KEEP WATER AND MOISTURE OUT OJ THE TOW BAR[ FTHERWISE. ICE MAY JORM
AND sAM MOVING PARTS[ -ANUALLY MOVE THE MALE LEG THROUGH THE ENTIRE RANGE AT INTERVALS
TO KEEP IT JROM JREEZING[ !ND BE SURE TO KEEP THE TOW BAR INSIDE WHEN NOT IN USE[
u
)N HOT AND HUMID CLIMATES. WIPE THE TOW BAR DRY WHEN YOUbRE DONE WITH IT SO THAT
MOISTURE WONbT CAUSE CORROSION[
#HECK WELDED sOINTS JOR CRACKS AND JOR BENT TOW BAR COMPONENTS[ >EPLACE BENT OR
CRACKED COMPONENTS[
3OME TOW BARS SHOW THEIR AGE THROUGH CRACKS AND WALLOWING AT THE ADsUSTMENT PIN
HOLES[ \OU SHOULDQ
u
,OOK AT ALL ADsUSTMENT PIN HOLES
ON THE TOW BAR LEGS[ )J YOU SPOT
ANY CRACKS AT THESE HOLES. ORDER
THE NECESSARY REPLACEMENT LEG[ 9SE
THIS CHART AS A tUICK REJERENCEQ
u
)J THERE ARE NO CRACKS. LOOK JOR
PIN HOLES THAT ARE WALLOWED OUT[
4HAT MEANS THEYbRE NO LONGER
ROUND. BUT ARE OBLONG[ #HECK THE
DIAMETER OJ ANY ODD;LOOKING HOLES
USING CALIPERS[
FN THE MALE LEGS. THE LARGEST
ACCEPTABLE HOLE DIAMETER IS
2<
/
:2
INCH[ FN THE u]ED AND MOVEABLE
LEGS. THE MA] DIAMETER IS
<1
/
6@
INCH[ >EPLACE ANY LEG THAT HAS
HOLES LARGER THAN THESE DIAMETERS[
,EGS THAT PASS THESE INSPECTIONS STILL NEED ATTENTION[ $EBURR THE PIN HOLES THAT NEED
IT USING EMERY CLOTH OR SANDPAPER[ #LEAN THE HOLES WITH A DRY CLOTH AND APPLY CORROSION
PREVENTIVE COMPOUND. SUCH AS ^3^ 85:5;55;8:=;6<<= OR ^3^ 85:5;55;<@6;86:=[
XHEELED 7EHICLESy
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#HECK TOW BAR JOR
CRACKS OR BENDS[
>EPLACE DAMAGED
COMPONENTS
&I]ED
LEG
-OVEABLE LEG
-ALE LEGS
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