PS Magazine - TB 43-PS-557
PS, The Preventative Maintenance Monthly
ISSUE 557
APRIL 1999
utting the pedal to the metal is great at the race track. When you’re working
your D7G, though, it puts you on the wrong track. When the tractor’s
steering brake pedals reach the floor, you can’t turn the tractor. It’s time for
an adjustment.
Have your mechanic adjust the brakes when the pedal free travel is more than
6
1
/
4
inches with the parking brake disengaged. Take the measurement at the
center of the pedals. Check ’em every 250 hours.
Mechanics, here’s how to make
the adjustment:
1.
Remove the guard and the brake
screw cover.
2.
Use a torque wrench and turn the
adjusting screw clockwise until you
get a reading of 14–16 lb-ft.
3.
Back off the screw 1
1
/
2
turns.
This gives the right clearance
between the brake linings and the
drum.
D7G Tractor . . .
Small Emplacement Excavator . . .
Pages 4-418 through 4-432 of TM
5-2420-224-20 have the complete
lowdown on how to raise and lower
the cab.
if you're
here to
raise
my
cab
,
you better
get help
!
don't
worry! i've
got a
buddy
on the
way.
oh, no!
my steering
brakes
aren't
working
!
hey!
what
gives?
echanics, it’s easy to damage the
engine’s throttle linkage and mounting
bracket when you open or close the
SEE’s cab.
Both the linkage and bracket are con-
nected to the driver’s side of the cab’s
engine wall. There’s not much room
between them and the hood. A dam-
aged throttle linkage means you’re
stuck with an engine that won’t accel-
erate or decelerate smoothly, if at all.
To protect the linkage and bracket,
have a buddy hold the other side of the
cab when it’s tilted forward or back.
That extra help keeps the cab clear of
the linkage.
Lift cab clear of throttle linkage
4.
Then, adjust the pedal linkage so
there’s 18
5
/
8
to 18
7
/
8
inches between the
brake pedal face and the front of the seat
support.
5.
Replace the cover and guard. Replace
the cover gasket if it’s damaged.
Repeat the procedure for the other pedal.
Tighten, then back off
Free travel less than 6
1
/
4
inches?
Adjusted position should
be 18
5
/
8
to 18
7
/
8
inches
25
APR 99
PS 557
24
APR 99
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