PREVENTIVE MAINTENANCE
SECTION V
At each 'B' Maintenance check, perform all `A' Checks in
addition to the following.
PERFORM WEEKLY AND SEMI-MONTHLY
LUBRICATION
Refer to the lubrication charts, in Section Ill, and lubricate
all weekly and semi-monthly (if applicable) lubrication
points indicated, with the type of lubricant specified.
CHECK BATTERY ELECTROLYTE LEVEL
The batteries are located to the left of the engine at the rear
of the machine. They are accessible through the rear doors.
Check the battery water level, and add distilled water as
necessary to maintain the water level 3/8 inch above the
plates. Clean any corrosion and/or dirt from the batteries
and terminals.
CLEAN EXTERIOR OF RADIATOR
Check the radiator core externally for any foreign material.
Blow out this material (insects, leaves, paper, etc.) with
compressed air. If necessary, a quality degreasing agent
may have to be used to get the radiator clean. Use com-
pressed air to dry the radiator after cleaning. The radiator
must be kept clean at all times to reduce the possibility of
engine overheating.
CHECK BOOM HOIST BRAKES
The boom hoist brake is a spring set, hydrautically released
brake. The boom hoist planetary brake is hydraulically set,
spring released.
To adjust the boom hoist brake, proceed as follows (see Fig-
ure 5B-1):
Figure 5B-1. Boom Hoist Brake
1. With the brake set (hydraulic pressure released from the
Adjustment (2100N404)
cylinder) the spring length should be 7-3/8 to 7-9/16
inches.
To adjust the boom hoist planetary brake, proceed as fol-
2. If the dimension observed in step 1 is greater than 7-
lows (see Figure 5B-2):
9/16 inches, tighten the brake band adjusting nut with hy-
1. With the brake set (hydraulic pressure applied), the cyl-
draulic pressure released from the cylinder. Test the ad-
inder piston extension should be 1/2 inch.
justment by releasing and setting the brake and
remeasuring the spring length.
2. If the dimention found in step 1 above has increased due
to lining wear, tighten the band adjusting nut as necessary
until the piston extension with the brake set is 1/2 inch.
NOTE
NOTE
As the lining wears, the spring length will increase.
The 1/2 inch piston extension given in step 1 is the
original setting. The length will increase as the brake
3. The brake band should be relined when the thickness of
lining wears.
the lining has been reduced to 3/16 inch, as measured at
the dead end of the band. See the Shop Manual for relining
3. The brake band should be relined when the thickness of
instructions.
the lining has been reduced to 3/16 inch as measured as
5-7
