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MQ PS4030 SAW • OPERATION MANUAL — REV. #0 (02/29/08) — PAGE 45
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MQ PS4030 SAW — MAINTENANCE
Belts and Pulleys
This saw uses a 6 groove 3V X 500 Optibelt for it's Drive Belt
System and a Hydrostatic Pump Belt, (AX-35).
Figure 47. Belt Locations
1. Blade Shaft Drive Belt
2. Transaxle Drive Belt
3. Belt Tensioner Pulley
V-Belt Tension
Ideal V-Belt tension is the lowest tension at which the belt will not
slip under peak load conditions.
Keep belts clean of foreign material that may cause
slippage. Never dress belts as this can cause premature
failure.
CAUTIONCAUTION
CAUTIONCAUTION
CAUTION
The V-belt tension on this saw is controlled by the hydraulic
system that actuates the Blade Shaft Engage/Disengage System.
Hydraulic pressure exerted on the engine tilt cylinder applies
force on the Belt Drive System to engage Bladeshaft rotation.
Figure 48. Belt Drive System
Engine must be at idle when engaging or dis-engaging
bladeshaft drive:
To STOP Bladeshaft Rotation:
Push rocker switch labeled BLADESHAFT forward. Engine will
tilt forward, dis-engaging the drive belt.
To START Bladeshaft Rotation:
Push rocker switch lableled BLADESHAFT backward. Engine
will tilt back, engaging the belt drive.
1. Engine Sheave
2. Tensioner Nut
3. Tensioner Base
4. Jackshaft Pulley
5. Tensioner Pulley