GMC 1989 Light Duty Truck, Руководство по ремонту, Страница: 609 / 998

MODEL M4MEF CARBURETOR 6C2-11
Figure 21 - APT M etering Rod Screw
F -0 1 9 0 6
POWER PISTON
ASSEMBLY
APT
(DO
METERING
ROD SCREW
NOT TURN)
Figure 23 - Removing Choke Cover Rivets
Float, Needle and Seat
Remove or Disconnect (Figure 22)
Tool R equired:
J 22769 o r BT-3006M - N ee dle Seat Tool.
1. F loat b o w l in se rt (235).
2. Float (237), h in g e p in (236), f lo a t needle (239)
and p ull c lip (238).
•
Pull u p on flo a t h in g e p in (236).
3. F loat n ee dle seat (240), and g a s k e t (241).
Primary M etering Jets
Remove or Disconnect (Figure 20)
• P rim a ry m e te rin g je ts (248) fro m flo a t b o w l.
N O TIC E: D o n o t re m o v e s e c o n d a ry m e te r in g
discs. T h e y a r e p r e s s e d in t o p la c e , a n d i f
d a m a g e d , e n tire b o w l re p la c e m e n t is re q u ire d .
4- +
Pump Discharge Bail and Pump Well Baffle
Remove or Disconnect (Figure 18)
1. Pum p d is c h a rg e p lu g (re ta in e r) (250).
2. Pum p d isch a rg e b all (251).
• In v e rt b o w l a nd catch ball.
3.
Pum p w e ll b a ffle (252).
CHOKE COMPONENTS
The ta m p e r re s is ta n t c h o k e c o v e r d is c o u ra g e s
unnecessary re a d ju s tm e n t o f th e c h o ke co ver and s ta t
assem bly. H o w e v e r, fo r o v e rh a u l, it is necessary t o
re m o ve th is assem bly.
Electric Choke Cover and Stat
Remove or Disconnect (Figure 23)
1. Heads o f c h o k e co ve r a tta c h in g riv e ts (330).
• Use a 4 m m (5 /3 2 ") d rill b it.
2. C hoke co ver re ta in e rs (331).
3. Electric c h o k e cover and s ta t assem bly (335).
4. R em ain ing pieces o f rive ts in h o u sin g .
• Use p un ch to d riv e o u t.
Choke Housing
|4--»| Remove or Disconnect (Figure 24)
1. C hoke h o u s in g to flo a t b o w l screw and w a s h e r
assem bly (341).
2. C hoke h o u s in g assem bly (340).
• Secondary throttle lockout lever (360).