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SECTION 4 - SERVICE
WARNING
Once blades are disengaged, they should come to a
complete stop in 7 seconds. If the blades continue
to rotate after 7 seconds, the electric clutch should
be checked. Replacement of electric clutch may be
necessary. Return machine to dealer for replacement.
DO NOT CONTINUE to operate mower if blades fail
to stop in 7 seconds.
4.1 ELECTRIC CLUTCH ADJUSTMENT
The Pro Hydro Mowers are equipped with an Electric Blade
Control. The cutter blades should STOP within 7 seconds
after the BLADE SWITCH is moved to “OFF” position. If
blade stopping time exceeds 7 seconds, check the clutch air
gap setting as follows:
1. With the Ignition Switch moved to “STOP” and the Blade
Switch moved to “OFF”, locate the three air gap check
“SLOTS” as shown in Figure 4.2.
FIGURE 4.2
2. Insert a feeler gauge into each of the three slots.
3. The clearance in each slot should be NO MORE than .010
to .012.
4. If adjustment is required, keep feeler gauge in slot and
turn the adjusting nut until the gap is correct.
5. Adjust all three slots.
4.2 HYDRAULIC SYSTEM ADJUSTMENTS
& SERVICE
4.2.1.
GENERAL HYDRAULIC SERVICING
1. The Hydraulic Oil and Filter should be changed as follows:
Change Oil and Filter after initial 25 hours of use.
Check Hydraulic Oil daily.
Thereafter, change Oil and Filter every 200 hours
(monthly).
Use SAE 10W-30 Oil for Hydraulic System. Always use a
genuine SNAPPER Filter.
NOTE
: Always clean the Cap and surrounding area before
checking Oil Level or adding Oil. The Hydraulic Oil Tank is
FULL when the Oil is 3” to 4” from the top of the filler neck as
shown in Figure 3 on Page 3.1.
2. Before removing parts from the Hydraulic System, check
to make sure another part of the machine is not causing
the problem. Look for:
A. Loose Drive Belt.
B. Improperly set or bad Idler Pulley.
C. Loose or lost setscrews and/or sheared Keys in
Pulleys.
D. Pump Release loose.
E. Oil saturated Drive Belts.
F. Loose Drive Arms on Pumps.
4.2.2. PUMP/MOTOR REPLACEMENT
1. Should it become necessary to replace a Pump or Motor,
it is recommended that the affected Pump or Motor be
replaced as a set (both Pump and Motor). Generally,
when a Pump or Motor is bad, it will affect the associated
Pump or Motor.
2. Relieve all pressure in the system and disconnect Spark
Plug(s). See Figure 4.3.
3. Replace the affected component(s).
FIGURE 4.3
4.2.3. HYDRAULIC PUMP REMOVAL
1. STOP ENGINE! Loosen and remove Nut from under the
Spring Tensioner for Hydraulic Belt Idler Tensioner.
Remove Spring from Bolt. See Figure 4.4.
FIGURE 4.4
ADJUST AIR GAP TO
BE .010 TO .012.
ADJUSTING NUT
CLUTCH
TURN PRESSURE RELIEF
VALVE ON EACH PUMP
COUNTER-CLOCKWISE
TO RELEIVE SYSTEM
PRESSURE.
RIGHT HAND
PUMP
LEFT HAND
PUMP
HYDRAULIC
PUMP BELT
BOLT
SPRING TENSIONER
REMOVE NUT