TYMCO DST-4 2019 - Basic Operations

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D4OPTRS 8 2019

BASIC OPERATION:

The operator should already be familiar with the safety precautions and operation of a

standard TYMCO Model DST-4 street sweeper:

1. To begin sweeping in dustless mode, use the auxiliary hydraulic system to lower the

pickup head and pull forward to seat the pickup head seal curtains.

2. Start the auxiliary engine and set RPM to 2100, turn on the DST Mode Switch and

observe the pressure gauge at the sweeper control panel.

3. Turn on the Purge Switch next to the DST Mode switch and begin sweeping. A loud

popping sound every 15-17 seconds indicates the purge system is working.

NOTE: Pressure should rebuild to 95-100 PSI between purge valve discharges.

Discharge interval is 15 to 17 seconds.

4. If conditions allow, turn on the hopper water for longer operational life of the ﬁ lters.

5. The sweeper is now ready for normal street sweeping operation.

6. The operator should observe the DST Filter Restriction Gauge to check ﬁ lter restriction.

The sweeper should perform virtually dustless up to 8" WC (water column) depending

upon the weight of the debris load.

7. Should the sweeper ﬁ lter restriction gauge reach 8-10" WC and dust is being created,

stop forward travel and allow the purge system to pulse the ﬁ lters for a few minutes

until the restriction gauge registers in the 3-5" WC range.

DST MODE

SWITCH

PURGE

SWITCH

AIR FILTER

RESTRICTION

GAUGE