PS Magazine - TB 43-PS-632
PS, The Preventative Maintenance Monthly
ISSUE 632
JULY 2005
Middle frame shaft cylinder locking arms are
breaking on the vehicle’s load handling system
(LHS). That’s because a lack of lube on the cylin-
der bushings is causing them to seize. When they
seize, the locking arms break as they try to turn
with the movement of the LHS.
Broken locking arms deadline your truck. That
means your truck has to go to DS for repair and to
have the mainframe boss inspected for wear.
So keep the LHS lubed.
Grease all twelve fittings
once a month or every
50 operating hours.
PS 632
JUL 05
22
CBT, HEMTT 1120-Series,
M1074/M1075 PLS…
T
welve grease fittings lube the load handling system (LHS) on the CBT, HEMTT
M1120-series, and M1074/M1075 PLS trucks.
You’ll find that info in your vehicle LO or -10 technical manual. Problem is, some
of these fittings are getting no lube at all!
Sure, it’s easy to lube the fittings in plain sight, but what about the ones you won’t
find until the hook arm is raised? They’re a little harder to see and get at.
But, if you don’t lube all of ‘em, the LHS hook arm will start sticking. Eventually
it won’t do any lifting at all.
…and put
your load
handling
system (LHS)
down for
repairs.
So
what’s
up?
read
on…
Lack of
Lube = NMC
Lube
fittings
to stop
arm
damage
Lube
Points
Hook arm cylinder
pivot pin (front)
Main cylinder pins
Hook arm cylinder
pivot pin (rear)
Hook arm
pivot pin (rear)
Main cylinder
pivot pin (rear)
Middle frame
pivot pin (rear)
# of
fittings
2
2
2
2
2
2
So lube
all
the
twelve fittings
monthly, or every
50 operating hours
of the LHS…
which-
ever comes
first.
it’s about time!
my cylinder
arms can’t take
much more!
hang
on!
I’ve
gotcher
grease
right
here!
Some LHS
lube points
are easy to
get to…
…while
others
require
lifting the
hook arm
Crewmen,
a lack of
lube will
cause real
problems
for you…
632.22-23(C!)
5/27/05
9:43 AM
Page 1
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