1. Unhook spring and disconnect ball joint assem-
250 HOUR MAINTENANCE OPERATIONS
bly from throttle control lever.
2. D e p r e s s accelerator until it contacts stop on
CHECK ENGINE RPM
ADJUST BUCKET LEVELER
3. Rotate throttle control lever to the extreme full
ADJUST BOOM KICKOUT
throttle position and adjust ball joint to obtain
BLEED BRAKE SYSTEM
a slip fit on throttle control lever just before
accelerator pedal bottoms.
ADJUST PARKING BRAKE
CHECK BRAKE DISC MOUNTING BOLTS
4. R e i n s t a l l b a l l j o i n t a s s e m b l y a n d r e c o n n e c t
SERVICE RESERVOIR RETURN FILTER ASSEMBLIES
CLEAN HYDRAULIC RESERVOIR SUCTION
5. Depress and release accelerator, and check that
a c c e l e r a t o r control rods will properly rotate
throttle control lever from idle to full throttle
E n g i n e Maintenance: Refer to Operation and
M a i n t e n a n c e Manual of engine manufacturer for
maintenance instructions of engine and accessor-
6. A d d i t i o n a l a d j u s t m e n t s m a y b e m a d e a t t h e
other ball joint or at accelerator pedal.
Check Engine RPM: Engine speeds should be
Pressure required to depress accelerator is con-
checked regularly against specifications to deter-
trolled by the spring on the throttle control lever.
mine engine efficiency and machine performance.
This spring also insures that the engine will return
Proper speeds insure safe operating limits for the
to idle speed when accelerator pedal is released.
engine and maintain correct operating speeds for
torque converter and transmission.
(b) Stall RPM: The engine and torque con-
verter act as a unit to deliver power to the trans-
(a) Low Idle and High Idle RPM: These
mission. A stall check should be performed to in-
speeds are the free operating limits of the engine
sure that the engine is developing rated power and
under no load conditions. They are determined by
that the torque converter is operating efficiently.
the amount of the amount of fuel delivered to the
engine, See Specifications and Service Data.
Caution: Check stall rpm only when torque con-
verter fluid is hot (180°F. to 200F.), engine is at
Caution: Do not accelerate to maximum rpm
operating temperature, and boom and bucket relief
until engine is at operating temperature.
valve setting is at proper specification.
Check throttle linkage to insure wide open
throttle when accelerator is fully depressed, also
closed throttle when accelerator is fully released.
2. Apply parking brake, block wheels, attach
Accelerator and linkage should operate freely in
safety links, and place directional lever in NEU-
Occasionally control rods, control levers or bell
3. Start engine and raise bucket a few inches
cranks loosen or become damaged, impairing the
above the ground.
operating efficiency of the engine. Insufficient pow-
er is frequently caused by throttle linkage being
4. Shift levers into FORWARD, HI speed range, and
out of adjustment. Adjust linkage if necessary.
accelerate engine. When engine reaches maxi-
mum rpm, pull back on bucket control lever to
rotate bucket to full close position. When engine
Fuel controls are accurately calibrated at the
factory to insure correct idle and high idle speeds.
Adjust Throttle Linkage: If throttle linkage
DO NOT STALL CONVERTER MORE THAN 30 SEC-
requires adjustment, proceed as follows.
ONDS AT ANY ONETIME.