Cap Pressure Test - Mityvac MV4530 Manuel D'utilisation

Cap Pressure Test

For diagnosing:
Proper function of pressure cap
Set-up & Procedure:
1. Ensure the cooling system is cool and not pressurized.
Carefully remove the radiator or coolant bottle pressure
cap (Fig. 10).
2. Select the correct Cap Adapter for the application. Refer to the
Adapter Selection Guide included in the kit.
3. Apply water or coolant to the rubber gasket and/or o-ring
on the cap, and install the cap onto the adapter (Fig. 11).
4. Install the Pressure Pump onto the Cap Adapter using the
quick-connect. Make sure the quick-connect sleeve snaps
forward to lock the connection (Fig. 12).
5. Determine the rated cap pressure. It will be printed on the
cap or in the vehicle manual. Compare this value to the
chart below (see Chart A) to determine the acceptable
pressure test range.
6. Operate the Pressure Pump until the cap releases pressure.
The pressure should relieve when the arrow is in the colored
band on the gauge face corresponding to the test range of
the cap (Fig. 13). Discard and replace the cap if it fails to relieve
pressure in the indicated range.
7. When testing is complete, release the pressure by pressing
the Pressure Relief Valve located on pump hose near the
quick-connect coupler (Fig. 14).
8. Disconnect the components, clean, and store them properly.
Form 823916
Fig. 10
Chart A: Cooling System Cap Pressure Test Ranges
Rated Pressure (PSI)
4
7
10
13 or 14
15 or 16
18
20
30
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Pressure Test Range (PSI)
3 - 5
6 - 8
9 - 11
12 - 16
14 - 18
16 - 20
18 - 22
28 - 30
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