Atlas Copco QAS 500 Volvo / Qc1002 — Coolant check (monitoring condition)
Testing & diagnosis · Cooling system
For the Atlas Copco QAS 500 Volvo / Qc1002, from the Atlas Copco manual.
Applies to: Volvo Penta TAD1641 GE engine, TAD 1641 GE engine
Procedure
- Verify the coolant color visually and confirm no loose particles are floating.
- Check the pH value with a pH-measuring device; typical EG value is 8.6.
- Check glycol concentration with a refractometer; keep above 33 vol.%, not above 68 vol.%.
- Replace coolant if pH is below 7 or above 9.5, or if condition is outside limits.
- Always top up with PARCOOL EG only, never with water alone.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Volvo Penta TAD1641 GE engine →
Source: Atlas Copco manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.