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ENGINE DIVISION SERVICE MANUAL
TM 5-4210-230-14&P-1
Fig. 41 Installing Tachometer Drive Bearing
1. Bearing
2. Press ram
3. Driver tool (pipe)
4. 14.3 mm (9/16 in.)
5. Support (pipe)
6.
Install new tachometer drive gear on distributor shaft.
New gear will have pin hole drilled in one side only.
Install as follows:
a.
Position gear on distributor shaft and align pin
hole with hole in shaft.
b.
Support distributor shaft in drill press and drill
hole through other side of gear.
c.
Install roll pin.
7.
Lubricate
and
install
mechanical
advance
components and trigger wheel assembly (See
Mechanical Advance System Service).
Tachometer Driven Gear and Shaft
The tachometer driven gear, shaft and bushing are
not provided for service. However, at the time of distributor
overhaul, these parts should be thoroughly cleaned and
lubricated as outlined below.
1.
Remove tachometer drive shaft cover as follows:
a.
Drill a 3mm (1/8 inch) hole in center of cover
(Figure 42).
b.
Insert a hooked tool or a punch into hole in
cover and pry cover from distributor housing
(Figure 42).
Fig. 42 Removing Tachometer Drive Shaft Cover
1. Drill Hole in Cover.
2.
Clean old lubricant from tachometer drive gear and
cavity in distributor housing. (See "IMPORTANT"
under Cleaning and Inspection).
3.
Inspect tachometer driven gear, shaft and bushing.
If excessive wear or damage is indicated, replace
distributor assembly.
4.
If parts are satisfactory for reuse:
a.
Fill tachometer drive gear and cavity with ball
bearing lubricant (Humble "Andok 260" or
equivalent).
b.
Install new tachometer drive shaft cover in
distributor housing.
DISTRIBUTOR REASSEMBLY
1.
Install distributor shaft into distributor housing as
outlined below:
IMPORTANT
If a new distributor shaft is being installed, a new
distributor driven gear or thrust collar and new
thrust washers must also be installed.
a.
Position new upper thrust washer(s) on shaft.
CGES-145-U Page 19
PRINTED IN UNITED STATES OF AMERICA
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