CYLINDER HEAD
66
Push rod bushings
The MTD engine has bushings for the push rods that
need to be replaced from time to time. An indication
that the bushings are worn is that the valve lash loos-
ens up. This is because the push rods start moving
side to side which opens up the valve lash.
To replace the push rod bushings:
1. Disconnect and ground the spark plug high ten-
sion lead.
2. Remove the spark plug using a 13/16” or 21mm
wrench.
3. Rotate the crankshaft until the piston is at TDC
of the compression stroke by following the steps
described in the valve lash section of Chapter 1:
Introduction..
4. Remove the valve cover.
5. Remove the jam and fulcrum nuts.
6. Remove the rocker arms and push rods. See
Figure 9.15.
7. Remove the rocker studs. See Figure 9.15.
8. Lift the push rod bushing plate out of the cylinder
head.
See Figure 9.16.
NOTE: When installing a push rod bushing
plate, make sure the bushings extend away from
the cylinder head.
See Figure 9.17.
9. Install by following the above steps in reverse
order.
NOTE: Tighten the rocker studs to a torque of 16
- 18 ft-lbs (22 - 25 Nm).
10. Adjust the valve lash by following the steps
described in Chapter 1: Introduction.
11. Test run the mower in a safe area before return-
ing it to service. Check all safety features.
Figure 9.15
Push rods
Rocker studs
Figure 9.16
Push rod bushing plate
Figure 9.17
This side points up, towards
the valve cover.
www.mymowerparts.com
For Discount White Outdoor Parts Call 606-678-9623 or 606-561-4983
To Next Page
Loading...
Need help?
General
