PREVENTIVE MAINTENANCE
SECTION V
1. With the planetary brake released, check the piston ex-
B. When the foot brake IS applied, pin "C" should not con-
tension of the cylinder. The piston should extend a mini-
tact the bottom of the slot of lever "G" as viewed
mum of 1/8 inch; if not, adjust by means of adjusting nut
through slot "E" of link "J".
"C".
C. When the spring brake IS applied (foot brake released),
2. With the brake set (hydraulic pressure to the cylinder)
pin "D" should not bottom in the slot of lever "G" as
the length of the piston extension should be 5/8 inch. Ad
viewed through slot "F" of link "K".
just the brake band adjusting bolt until this dimension is
D. Pins "C" and "D" on both brakes should not contact the
reached. The maximum allowable piston extension is 1
ends of the slots in side links "J" and "K".
inch.
9. If the piston of foot brake cylinder extends to 27/32 inch,
NOTE
tighten adjusting nuts "C" to reduce the piston extension.
Loosening the brake band adjusting bolt will in-
Check the alignment as described in step 8B above.
crease the piston extension. Tightening the adjust-
10. The brake bands should be relined when lining thick-
ing bolt will decrease the piston extension.
ness reaches 3/16 inch as measured at the dead end of the
3. The brake band should be relined when the thickness of
band.
the lining has been reduced to 3/16 inch as measured at
the dead end of the band. See the Shop Manual for relining
NOTE
instructions.
The dead end of the band refers to the end to which no
4. After the machine has been operated long enough to
force is applied. The live end of the band refers to the
warm the drums and the brakes have been properly ad-
end of the band to which force is applied.
justed, check the adjustment of the hanger springs. The
hanger springs should be adjusted so that the brake band
clears the drum uniformly around its circumference, with
the brake in the released position (hydraulic pressure re-
CHECK LEFT AND RIGHT DRUM
leased).
PLANETARY BRAKES
5. Recheck dimensions given in steps 1 and 2 with the
The left and right drum planetary brake are provided be-
brakes warmed and adjust as necessary. Be sure that pin
cause the machine is equipped with power lowering on the
"D" does not come in contact with slot "F"of link "K". If this
left and right drum. The brakes are hydraulically set, spring
occurs, step 1 and 2 must be repeated to eliminate the pin to
released.
slot contact.
To check the adjustments of the planetary brakes, proceed
6. Replace any sheet metal removed
as follows (see Figure 5B-9):
5-14
