From RROCA-info

25-30 HP Owner's Handbook (Condensed Edition No.XVII)

For chassis series GUL GRM GAN GRO GRP GAR GYL GXM GWN GHO GMP GGR GHL GGM GUN GMO GLP GZR.

CONTENTS	PAGE
SERVICE FACILITIES FOR ROLLS-ROYCE CARS	4
LEADING PARTICULARS OF CHASSIS	5
CHAPTER I.- STARTING THE ENGINE AND DRIVING THE CAR	7
Starting the Engine - Ignition Control - Throttle Control - Change-over Switch for Fuel Pump - Fuel Gauge - Gear Changing - Controllable Shock Dampers - Lighting Control and Switch - Radiator Shutters - Overheating - Fitting of Snow Chains.
CHAPTER II.-- PERIODIC LUBRICATION AND ATTENTION	13
Lubricants recommended - Capacities - Centralised Chassis Lubrication System - Daily Maintenance - Every 2,000 miles - Tappet Adjustment - Every 5,000 miles - Every 10,000 miles - Every 20,000 miles - Care of Wheels and Hubs - Replacement Tyres - Balancing Road Wheels.
CHAPTER III.- FUEL SYSTEM	30
The Fuel System - Fuel Pumps - Petrol Filters - Action of the Carburetter - Accelerator Pump - Economiser Jet - Strangler Control for Starting Adjustment of Carburetter - Setting of Idling Adjustment - Diagnosis of Faults - Float Feed Mechanism - "Hot Spot" - Air Silencer and Cleaner.
CHAPTER IV.--ADJUSTMENT OF BRAKES	40
General - Adjustment of Foot brakes - Adjustment of Hand brakes - Adjustment of Servo.
CHAPTER V.-- THE CLUTCH	45
Adjustment of Clutch.
CHAPTER VI.-- COOLANT SYSTEM	46
Coolant Pump - Radiator shutters - Coolant Level - Frost Precautions - Fan.
CHAPTER VII.- ELECTRICAL SYSTEM	50
General - Battery - Battery Ignition - Sparking Plugs - Electrical Fault Location
GUIDE TO MAIN SERVICE STATION	55
GUIDE TO CREWE SERVICE STATION	56