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Removal (Fig. 12)
1. Release tension on idler torsion spring (item 19):
CAUTION
Be careful when removing or applying tension
from or to the torsion spring of the idler pulley.
The spring is under heavy load and may cause
personal injury.
A. Insert nut driver or small piece of pipe onto the
end of the torsion spring.
B. Push down on the spring end and unhook the
spring from the idler mounting bracket.
2. Remove belt tensioner components from engine as
needed using Figure 12 as a guide.
Installation (Fig. 12)
1. Install belt tensioner components to engine using
Figure 12 as a guide.
2. Install the hydraulic pump drive belt and primary
drive belt (coring head).
3. Apply tension to idler torsion spring (item 19):
A. Insert nut driver or small piece of pipe onto the
end of the torsion spring.
B. Push down on the spring end and hook the spring
under the idler mounting bracket notch. Release the
spring slowly to lock it into place.
4. Adjust the hydraulic pump drive belt (see Operator’s
Manual) and primary drive belt (coring head) (see Pri-
mary Drive Belt in the Service and Repairs section of
Chapter 7 – Coring Head).
Kohler
Engine
ProCore 648 Page 3 – 17 Kohler Engine