Rolls-Royce 20/25: S series

Filtered parts lists for Rolls-Royce 20/25: S series

AA: Chassis frame, mountings, brackets
AD: Bulkhead and fittings
BA: Front springs and shackles
BC: Rear springs and shackles
BD: Rear shock damper links
BE: Shock dampers
BFR: Front damper link, 20hp & early 20/25
CA: Axle beam and stub axles
CB: Front hub and brake drum
CC: Front brakes
DA: Differential assembly
DB: Rear hub and brake drum
DC: rear brakes
EA: Brake servo
EB: Brake equaliser shafts and brake ropes
FA: Steering box
FB: Side steering tube
FC: Cross steering tube
GA: Cylinder head
GB: Cylinder Block
GC: Crankshaft and connecting rods
GD: Flywheel and clutch
GE: Crankcase and main bearings
GF: Crankshaft vibration damper
GG: Timing gears and auxiliary drives
GH: Camshaft and cam followers
GJ: Sump,oil pump, pipes and filter
GK: Fan
HA: Gearbox
HE: Propeller shaft and universal joints
JA: Fuel tank and fittings
JB: Fuel pipes and filter
JC: Fuel pumps
JD: Carburettor
KA : Radiator core and hoses
KB: Water pump
KC: Radiator mountings
KE: Radiator shell, shutters and cap
LB: Ignition system
LC: Dynamo
LD: Starter motor
LF: Charging and distribution
MA: Exhaust system
NA: Pedals and related linkage

Notes on S series 20/25

S series chassis have chassis prefixed GNS, GOS and GPS.

New features intoduced on S-series cars
The design of the cylinder head valve guides was altered. Grooves were introduced in the face of the road springs leaves for lubricant transfer.
From GOS22 a friction damper was added to the brake servo, to restrict the speed of application of the front brakes. The brake servo linings were fixed with staples rather than rivets.

View the Chassis Numbers for the Rolls-Royce 20/25: S series