Dake Model SAR 331 - Manual (Page 12)

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SAR 331 SA GDS
ROUTINE
AND SPECIAL
MAINTENANCE
THE MAINTENANCE JOBS ARE LISTED BELOW, DIVIDED INTO
DAILY, WEEKLY, MONTHLY AND SIX-MONTHLY INTERVALS. IF
THE FOLLOWING OPERATIONS ARE NEGLECTED, THE RESULT
WILL BE PREMATURE WEAR OF THE MACHINE AND POOR
PERFORMANCE.
8.1 - Daily maintenance
- General cleaning of the machine to remove accumulated shavings.
- Clean the lubricating coolant drain hole to avoid excess fluid.
- Top up the level of lubricating coolant.
- Check blade for wear.
- Rise of saw frame to top position and partial slackening of the
blade to avoid useless yield stress.
- Check functionality of the shields and emergency stops.
8.2 - Weekly maintenance
- More accurate general cleaning of the machine to remove shav-
ings, especially from the lubricant fluid tank.
- Removal of pump from its housing, cleaning of the suction filter
and suction zone.
- Clean the filter of the pump suction head and the suction
area.
- Cleaning with compressed air of blade guide arms (guide
bearings, pads and drain hole of the lubricating cooling).
- Cleaning flywheel housings and blade sliding surfaces on
flywheels.
- Check condition of the blade cleaning brushes.
- Greasing of motor flywheel bearings.
8
PROBABLE REPLACEMENT OF OTHER PARTS –
REDUCTION GEAR OR SPEED CONTROL, MOTOR PUMP
AND ELECTRICAL COMPONENTS – TO BE EXECUTED BY
SPECIALISED AND COMPETENT PERSONNEL.
7.8 - Regulating the frame raising spring
- It is possible to modify the tension of the frame return spring in
order to obtain increased cutting pressure while lowering to
cut.
- Loosen the nut (F) to remove tension from the spring until the
desired tension has been reached.
- NB: the spring tension should not be loosened in an exagger-
ated manner. Doing so can influence the balance of the blade-
carrying frame.
F
7.9 – Replacing the blade
- Raise the frame to the high position.
- Use the handwheel to loosen the blade, remove the mobile
blade-guiding shield and the belt-cleaning brush shield.
- Open first the rear then the front flywheel casing and extract
the old blade from the flywheels and the blade-guiding blocks.
- Position the new blade, placing it firstly among the plates and then
on the flywheel seats. Make sure that the teeth are positioned in the
correct direction for cutting (see drawing below).
- Tighten the blade, making sure it adapts perfectly to the fly-
wheel seats.
- Reposition the mobile blade-guiding shield, the belt-cleaning
brush shield and close the flywheel casings. Make sure that
the safety microswitch activates, otherwise the machine will
not start when powered again.
WARNING: always use blades having the dimensions speci-
fied in this manual and for which the blade guide heads
have been set: otherwise, see chapter on "Description of
the operating cycle" in the Starting-up section.
BEFORE PERFORMING THE FOLLOWING OPERATIONS, THE
ELECTRIC POWER SUPPLY AND THE POWER CABLE MUST
BE COMPLETELY DISCONNECTED.
CUTTING DIRECTION
7.10 – Replacement of the return spring arch
- During the entire operation, it will be necessary to keep the
arch lifted and secured.
- First loosen the tension spring and unhook it from the
supporting spring immediately behind.