Finish Reaming; Replace Brass Or Sintered Iron Valve Guides Remove Bushing - Briggs & Stratton Twin Cylinder L-Head Repair Manual

Finish Reaming

1. Finish ream guide with reamer #19233, and pilot
guide #19234, Fig. 14.
a. Lubricate reamer with Stanisol or kerosene.
2. Ream clockwise through entire guide into valve
tappet chamber,
3. Keep turning reamer clockwise when removing
reamer from guide.
a. Flush out all chips.
Replace Brass or Sintered Iron Valve Guides
Remove Bushing
Brass or sintered iron valve guide bushings are
replaceable as follows:
1. Lubricate tap Tool #19264 and valve guide
bushing with engine oil or kerosene.
2. Using a tap wrench, turn tap clockwise into valve
guide bushing approximately 1/2" (13 mm). DO
NOT turn tap more than 1" (25.4 mm) deep.
3. Remove tap and clean chips from bushing
threads, Fig. 15.
4. Thread Nut, Tool #19239, up until it touches head
of Puller Screw, Tool #19238.
5. Place Puller Washer, Tool #19240, over valve
seat, keeping it centered. Lubricate puller screw
with Stanisol or kerosene and thread puller screw
into bushing until it bottoms, Fig. 16.
6. Hold hex head of puller screw from turning and
turn hex nut down on puller washer. Continue
turning nut until bushing is removed, Fig. 17.
6
5
Fig. 14 – Finish Ream
Fig. 15 – Thread Bushing
#19238
Fig. 16 – Install Puller Screw
Fig. 17 – Remove Bushing
FINISH
REAM
THROUGH
TO VALVE
TAPPET
CHAMBER
METRIC TAP
#19264
#19239
#19240