Dashpot: Adjustments

Fig. 18 Dash Pot (Exploded View):

1. Warm up engine.
2. Check idle speed and adjust, if necessary.
3. Remove cap, filter and separator from DP. Fig. 18

Fig. 203a Dash Pot Test:

4. Check DP setting speed.
a. Maintain engine speed at 2,500 rpm with the throttle valve.
b. Plug the vacuum transmitting valve (VTV) hole with your finger. Fig. 203a
c. Release the throttle valve.
d. Check the DP setting speed.

DP Setting Speed: 1,800 rpm
(w/ Cooling Fan OFF)

Fig. 204a Dash Pot Adjustment:

5. If not as specified, adjust with the DP adjusting screw. Fig. 204
6. Check operation of VTV
a. Set the DP speed in the same procedure as above.
b. Release the plugged hole and check that the engine returns to idle in approx. 1 second. If not as specified, check for sticking plunger. Replace DP, if a problem is found.
7. Reinstall DP separator, filter and cap.