VolvoEngine Parts

FPCY2405056 — Rocker Shaft Assembly Zz90158 Zz90055 Zz90030 For Perkins Engine 4-236 4-248 1004-4 Volvo Tractor 2200 2204 2250

This rocker shaft assembly is a vital part of the engine's valve train, controlling the opening and closing of intake and exhaust valves. Manufactured to high standards, it ensures precise valve timing and lift, differing from worn assemblies that exhibit excessive play or damage. Operator symptoms of a failing rocker shaft assembly include engine misfires, rough idling, loss of power, and audible ticking or knocking noises from the cylinder head.

Rocker Shaft Assembly Zz90158 Zz90055 Zz90030 For Perkins Engine 4-236 4-248 1004-4 Volvo Tractor 2200 2204 2250 – Part No FPCY2405056 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeRocker Shaft Assembly
MaterialHardened steel alloy
ApplicationEngine valve train
Service LifeReplace as needed based on wear
CompatibilityPerkins 4-236, 4-248, 1004-4; Volvo 2200, 2204, 2250
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial symptoms of a failing rocker shaft assembly include a distinct ticking sound from the cylinder head and a slight reduction in engine performance. If left unaddressed, the noise will intensify, leading to intermittent misfires and a noticeable loss of power. Continued operation can cause severe valve train damage and potential piston-to-valve contact.

Installation Tip

Ensure the oil passages within the rocker shaft are clear and properly lubricated before installation to prevent initial dry-start wear. Avoid overtightening the rocker shaft pedestal bolts, as this can distort the shaft or damage the cylinder head.

Service Note

Inspect camshaft lobes and valve lifters for wear when replacing the rocker shaft assembly.