Smithco Spray Star 1760 (Sn 176G012 – Current) Parts & Service Manual - Manual (Page 14)

Ser
vice
12
ADJUSTMENTS
INTERLOCK SWITCH
Located on the front, below the floorboard and behind the clutch. The Interlock Switch is in the electrical circuit
between the starter solenoid and the starter on the ignition switch. When the clutch pedal is depressed, it
pushes the plunger on the interlock switch in, which creates a circuit. Thus allowing the engine to start. When
the clutch pedal is released the plunger on the interlock switch comes out, which breaks the circuit. To adjust,
loosen the two nuts holding the interlock switch and move the interlock switch towards or away from the clutch
pedal as needed.
HYDRAULIC POWER UNIT BELT
Located to the rear and left of the engine. Should have approximately 1 /
4
" (6.5 mm) of deflection in the center of
the top strand. To adjust, loosen the bolt holding the hydraulic power unit bracket to the frame and adjust the belt
tension as required. Retighten the bolt after the adjustments made.
FOOT CLUTCH BELT
See belt and pulley drawing in this book. Belt retainer should be adjusted so that there is 1 /
8
" to 1 /
4
" (3.25 to 6.5
mm) clearance between the belt and retainer with the clutch fully engaged. This is just a starting point. Start the
engine with the transmission in neutral and the park brake set. Engage and disengage the clutch, check to see
if the belt has stopped and is against the retainers. If not shut engine off and readjust the retainers. Adjust the
clutch rods as required to shorten, turn the ball joints in and out to lengthen.
SPRAY PUMP
Located to the rear and left of the engine. Should have approximately 1 /
2
" (13 mm) of deflection in the center of
the top strand. Loosen and tighten the 3 /
8
- x 2 1 /
2
set screw located on the frame pushing against the pump
arm.
PARK BRAKE
Adjust on lever. Adjust on clevis.
BRAKES
Can be adjusted from outside of brake drum with a brake tool.
MASTER BOOM SWITCH (FOOT SWITCH)
The master boom switch, located on the left floorboard is used to override the master switch on the computer
console of the spray systems. By pushing down it will turn on/off the booms. For the 440 System the Master
Switch on the computer must be off for the master boom control switch to work.
SPEED CALIBRATION NUMBERS
The speed calibration number for the Spray Star 1602 is 114. This is measured off the drive shaft.