Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1983SUBURBAN C20, 5.7 M, STANDARDREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSOVERHAUL & TESTING - 700-R4/4L60COMPONENT DISASSEMBLY & REASSEMBLYOIL PUMP ASSEMBLYDISASSEMBLY
1983 Chevrolet Suburban C20, 5.7 M, Standard
Oil Pump Assembly: Disassembly
1983 Chevrolet Suburban C20, 5.7 M, StandardSECTION Disassembly
- Remove reverse input clutch drum-to-pump thrust washer, pump-to-case gasket and pump-to-case oil seal ring from pump assembly. Remove pump cover retaining bolts. Separate pump cover from pump body.CAUTION: Pump slide spring and pressure relief spring rivet are under high pressure. To prevent possible injury, cover springs during removal.
- Using needle-nose pliers, compress pump slide spring. Remove from pump by pulling straight out. Remove pump vane rings, pump vanes, pump rotor and rotor guide from pump pocket.
- Remove slide from pump pocket. Remove slide seal and seal support from pump slide. See Fig 1 . Remove pivot pin and pivot pin spring. Remove seal ring and "O" ring from pump slide. Remove seal retainer and seal from pump body.
- Check condition of pump bushing. If bushing is in good condition, DO NOT remove it. Push inward on converter clutch valve stop to compress spring. Remove snap ring. Remove valve stop, converter clutch apply valve and springs.
- Using a small punch, remove pressure relief spring retaining rivet. Remove relief spring and ball. Remove oil screen and "O" ring from pump cover. Using a small screwdriver, compress throttle valve boost valve bushing. Remove snap ring.
- Remove Throttle Valve (T.V.) boost bushing, throttle valve boost valve and reverse boost valve sleeve. Remove reverse boost valve, pressure regulator valve spring and pressure regulator valve.
LEGEND FOR FIGURE 46
| Item No. | Description |
|---|---|
| 1 | Rivet |
| 2 | Pressure Relief Spring |
| 3 | Check Ball |
| 4 | Stator Shaft Screw |
| 5 | Cover-To-Body Bolt |
| 6 | Converter Clutch Spring (Inner) |
| 7 | Converter Clutch Spring (Outer) |
| 8 | Converter Clutch Valve |
| 9 | Valve Stop |
| 10 | Snap Ring |
| 11 | Pump Slide Spring (Inner) |
| 12 | Pump Slide Spring (Outer) |
| 13 | Oil Pump Cover Plug |
| 14 | Oil Pump Cooler Feed Plug |
| 15 | Oil Pump Converter Clutch Signal Plug |
| 16 | Retainer & Ball Assembly |
| 17 | Auxiliary Accumulator Valve Tube |
| 18 | Rotor Guide |
| 19 | Pump Vane Ring |
| 20 | Seal Support |
| 21 | Pump Slide Seal |
| 22 | Bushing |
| 23 | Seal |
| 24 | Seal Retainer |
| 25 | Pump Body |
| 26 | Seal Ring |
| 27 | "O" Ring |
| 28 | Pivot Pin Spring |
| 29 | Pivot Pin |
| 30 | Pump Slide |
| 31 | Vane |
| 32 | Rotor |
| 33 | Stator Shaft |
| 34 | T.V. Boost Bushing |
| 35 | T.V. Boost Valve |
| 36 | Boost Valve Sleeve |
| 37 | Reverse Boost Valve |
| 38 | Regulator Valve Spring |
| 39 | Pressure Regulator Valve |
| 40 | Pump Cover |
| 41 | Screen |
| 42 | Oil Seal Ring |
| 43 | Oil Pump Air Bleed Plug |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.