Hyundai — Main pump assembly

Repair & overhaul

From a Hyundai service manual — check it applies to your exact model before use.

Procedure

1. For reassembling reverse disassembling procedures.
2. Repair parts damaged during disassembling and prepare replacement parts in advance.
3. Clean each part fully with cleaning oil and dry with compressed air.
4. Apply clean working oil to sliding sections, bearings, etc. before assembly.
5. In principle, replace seal parts such as O-rings and oil seals.
6. For fitting bolts, plug, etc., prepare torque wrench and tighten with torques shown on page 8-11, 12.
7. For double-pump, take care not to mix up parts of front pump with rear pump.
8. Fit swash plate support(251) to pump casing(271), tapping lightly with hammer.
9. Fit tilting bush of swash plate to tilting pin(531) and fit swash plate(212) to swash plate support(251).
10. Assemble piston cylinder subassembly [cylinder block(141), piston subassembly(151,152), set plate(153), spherical bush(156), spacer(158) and cylinder spring(157)].
11. To swash plate support(251), fit drive shaft(111) set with bearing(123), bearing spacer(127) and snap ring(824).
12. Assemble seal cover(F,261) to pump casing(271) and fix with hexagon socket head bolts(406).
13. Fit valve plate(313) to valve block(312), entering pin into pin hole.
14. Fit valve block(312) to pump casing(271) and tighten hexagon socket head bolts(401).
15. Putting feedback pin of tilting pin into feedback lever of regulator, fit regulator and tighten hexagon socket head bolts(412,413).

Source: Hyundai service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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