Heres the manual section about the fuel pump:
Fuel and Vacuum Pump Assembly. (Fig 4-9)
1 Vacuum outlet
2 Vent plug connection
3 Fuel outlet
4 Fuel inlet
5 Vacuum inlet
(1) Fuel pump. (Fig 4-10)
1 Screw
2 Spring (vacuum)
3 Valve
4 Nut
5 Lock washer
6 Flat washer
7 Piston plate (upper)
8 Piston 0-ring
9 Piston plate (lower)
10 Screen
11 Gasket
12 Main pump body
13 Diaphragm assembly
14 Valve seat
15 Spring
16 Valve
17 Gasket
18 Cover (fuel)
19 Screw
20 Filter screen
21 Pump valve body
22 Cam lever return spring
23 Cam lever
24 Cam lever retainer pin plug
25 Cam lever retainer pin
26 Rod
27 Spacer
28 Cover (vacuum)
NOTE: Thoroughly clean outside of pump assembly with mineral spirits paint thinner and dry with compressed air.
(a) Mark main pump body (12 fit 4-10) and pump valve body (21) with a file or hacksaw for reassembly in the same position.
(b) Remove cam lever return spring (22), cam lever pin plug (24), cam lever retainer pin (25) and remove the cam lever (23).
(c) Remove screws (1) securing pump valve body (21) to main pump body (12). Separate pump bodies. Remove diaphragm assembly (13) from main pump body.
(d) Remove two screws (19) and washers attaching the pump valve body (21) to the cover (18). Separate pump valve body assembly from pump valve cover. Remove gasket (17), valve seat (14), spring (15), valve (16), and filter screen (20) from valve housing.
(2) Vacuum Pump.
(a) Mark castings at vacuum cover (28) and main pump body (12) with a file or hacksaw.
(b) Remove four screws (1) attaching vacuum cover (28) to the main pump body
(12).
(c) Separate vacuum cover (28) gasket (11) and spring (2) from main pump body (12).
(d) Remove vacuum pump piston assembly from pump body.
(e) Remove nut (4) and washers (5, 6) securing pump piston plates (7, 9), spacer (27) and piston 0-ring (8) to the pump piston rod (26). Discard piston 0-ring (8).
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4-5. Inspection.
Fuel Pump. (Fig 4-10)
(1) Clean and rinse all metal parts in solvent. Blow out all passages with air hose.
(2) Inspect main pump body (12), fuel cover (18) and vacuum cover (28) for cracks, breakage and distorted flanges. Examine all screw holes for stripped or crossed threads. Replacement of pump assembly is advisable if one of the three main castings is not serviceable.
(3) Inspect cam lever (23) for wear
or scores at point of contact with push rod.
(4) Discard diaphragm (13) and piston O-ring (18).
(5) Discard valves (3, 16), and assemblies as these parts cannot be visually checked for wear.
(6) Discard cam lever (23), pistons (7, 9) and diaphragm springs (2, 13), as removed because old springs may be distorted, weak or corroded.
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4-7. Reassembly.
(1) Fuel Pump. (Fig 4-10)
(a) Install filter screen and valve assembly (14, 15, 16) into pump valve body assembly (20). Install gasket (17) and cover (18) and secure with the two housing cover screws and lock washers (19). Refer to figure 4-10.
(b) Install diaphragm assembly (13) in main pump body (12).
(c) Install pump valve body assembly (21) on main pump body with marks alined. Start screws (1) but do not tighten.
(d) Install cam lever (23), cam lever retaining pin (25) and cam lever pin plug (24).
(e) Flex diaphragm assembly (13) to the full up position. Hold in place, and secure valve housing retaining screws (1). Install cam lever return spring (22).
(2) Vacuum pump.
(a) Assemble vacuum pump piston lever spacer (27), lower piston plate (9), 0-ring (8), upper piston plate (7), upper washer (6), to the pump piston rod (26) and secure with nut (4) and lock washer (5).
(b) Install vacuum pump piston in the main pump body bore (12).
NOTE: Coat O-ring (8) with lubricant or vaseline for ease of assembly and to eliminate piston sticking in main pump body bore (12).
(c) Install vacuum valve piston spring (2), gasket (11) and vacuum cover (28) in the main pump body (12).
(d) Secure vacuum cover (28) to main pump body with four retaining screws (1).
NOTE: Tighten retaining screws evenly to avoid vacuum leaks.
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Pro-choice, that's a LIE, babies don't choose to die!!