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 printable version
Service oil pump
Removal and dismantling | - Remove the cover of the gas distribution chain and sprocket oil pump drive chain.
- Loosen the clamps and disconnect fuel hoses kuporte open ends to prevent ingress of dirt into the supply system.
- Give fixing bolts and remove the fuel pump from the engine.
- Give fixing bolts and nuts, and remove from the front of the engine oil pump. Discard the O-ring.
- Give bolts of the front and back covers of the oil pump, remove the cover from the pump casing (the components of the oil pump are shown on an accompanying illustration).
- Give a nut of the cam drive of the fuel pump, then remove the washer and a cam shaft of the oil pump. Remove from the oil pump inner rotor assembly (rotor) to the shaft and an outer wheel (rotor).
- Remove the front cover of the pump spring (s), pressure reducing valve and the valve plug (see. Accompanying illustration).
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Checking the Status | - Thoroughly rinse the components of the oil pump in the solvent and dry them naturally.
- Check the internal and external gear pump for signs of wear. Replace defective components.
 | - Temporarily install two gears back into the pump and by means of a blade-type probe, check the clearance between the outer gear and the pump housing (see. Accompanying illustration). Compare result of measurement with the regulatory requirements (see. Table sizes and adjustments in the end of this manual). If necessary, replace the pump.
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 | - Measure the clearance between the teeth of the inner rotor and outer shoulders (cm. Accompanying illustration). In case of exceeding the permissible value, replace the pump.
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 | - Press the edge of the meter to the flatness of the end of the pump housing and to measure the gear backlash (see. Accompanying illustration). If necessary, replace the pump.
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- Check relief valve plunger for scoring and scratches. The plunger should be quite a tight fit in the cover of the pump. Check the spring for any loss of force that the presence of broken and turns.
- Inspect the fuel pump drive cam for the presence of cavities and seizure, in case of need make replacement.
- Using a hammer and punch, remove the needle roller bearing shaft of the internal gear pump housing. Discard bearing. Check the condition of the surface of the landing gear on the shaft bearing. In the event of burrs and rough edges, replace the shaft.
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Assembly and installation | - With punch and mandrel set in the pump housing a new needle bearing.
- Liberally lubricate all components of motor oil and gear set in the pump housing.
- Install the front cover with a new O-ring in several stages, tighten the fixing bolts to 7 ÷ 8 Nm.
- Fill the relief valve piston and spring (s) in the front cover of the pump, tighten the plug with a force of 39 ÷ 69 Nm, do not forget to change her washer.
- Install the fuel pump drive cam and tighten the retaining nut with a force of 16 ÷ 19 Nm.
- Place a pillow of hermetic in diameter continuous section 2 ÷ 3 mm into the groove in the back of the pump, and then for no more than ten minutes to push the cover to the pump casing and fix its bolts. Effort should be a tightening of bolts 7 ÷ 8 Nm.
- Place a pillow with sealant section ø 2 ÷ 3 mm into the groove of the front cover of the pump, set to cover the new O-rings, then press the assembly of the pump casing. Tighten the mounting bolts to 7 ÷ 8 Nm.
 | Before starting the engine allow the sealant to dry for at least thirty minutes. |
- Install the fuel pump assembly with a new insulation. Tighten the mounting bolts.
- Set the drive sprocket assembly with the chain, and the chain cover gas distribution crankshaft pulley.
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