641 & 651 TRACTOR-SCRAPERS Starting The Engine Caterpillar


Starting The Engine
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1.1. Above 60° F (16° C)
2.1. Below 60° F (16° C)
3.1. When Starting Fluid is Required
4.1. Starting with Boost

1. Move transmission control to NEUTRAL.

2. Turn to engage transmission safety lock.

3. Push brake control to PARK, if so equipped.

4. Push cushion hitch control to LOCKDOWN. Stay clear of hitch area.

5. Move scraper controls to HOLD.

6. Turn disconnect switch ON.

Above 60° F (16° C)

7. Depress accelerator just past detent.

8. Turn switch to START. Release switch when engine starts.

Below 60° F (16° C)

7. Depress accelerator just past detent and turn switch to HEAT for indicated time.

8. Turn switch to START. Release switch when engine starts.

When Starting Fluid is Required

7. Depress tractor accelerator just past detent.

8. Turn switch to HEAT for indicated time.

Never operate electric starter for more than 30 seconds without allowing 2 minutes cooling before using again.

9. Turn switch to START and spray starting fluid sparingly into precleaner while cranking.

10. When engine starts, it may be necessary to return switch to HEAT until engine runs smoothly. Release switch.

Starting with Boost

When using jumper cables, be sure to connect in parallel: Negative (-) to negative (-) and positive (+) to positive (+).

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Use starting fluid sparingly. Follow manufacturers instructions carefully.

Never switch to HEAT when engine is warm and running.

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