Service instructions.

Service instructions

Every Ramair kit is supplied with a complete fitting instruction set specific to the application, including torque values, belt routing diagrams, and pulley tensioning specifications. The instructions on this page provide general guidance for the most common service tasks across Ramair installed systems. For application-specific procedures, always refer to the fitting instructions supplied with the kit.

Service intervals are determined by the application and operating conditions. The warranty service label applied to the engine bay and windscreen specifies the service schedule. The service logbook records each service event and supports continuity of the Ramair Manufacturer's Warranty across the working life of the installation.

Idler pulley replacement

Idler pulleys are wear components in any belt-driven system. Ramair supplies replacement pulleys manufactured from hard wearing material, with design and material specifications matched to the original application. In some instances, design improvements may mean the shape or material of the replacement pulley differs slightly from the pulley being replaced.

The procedure for replacing an idler pulley on a Ramair installed system is as follows:

1. If the engine has a serpentine belt, sketch the belt route and note the order in which the pulley components are removed before disassembly
2. Release belt tension and either lay the belt aside or remove it entirely
3. Remove the faulty pulley, taking care as some securing bolts have a left hand thread
4. Where the new pulley is supplied with a bolt and dust cover, both must be used. Fit the bolt head into the cup of the dust cover
5. Where the bolt and dust cover are not supplied, the original bolt and dust cover are reused. In some cases the original dust cover may not fit, in which case it is acceptable to install the pulley without the dust cover
6. Tighten the securing bolt to the manufacturer's specification
7. Spin the pulley by hand to confirm it turns freely
8. Check the belt for wear or damage. Replace the belt where any wear is present
9. Set the belt tension to Ramair's specifications as outlined in the fitting instructions supplied with the kit

Belt and tensioner service

Drive belts are the primary wear item in any compressor or alternator drive system. Inspection at every service interval is required. Belts showing cracking, glazing, fraying at the edges, or loss of profile depth should be replaced before failure.

When replacing a belt, always inspect the tensioner, idler pulleys, and bearing surfaces for wear at the same time. A worn tensioner or idler pulley will accelerate wear on the new belt and may compromise the warranty position on the installation.

Belt tension must be set to the specification provided in the fitting instructions for the specific kit. Over-tensioning accelerates bearing and compressor shaft wear. Under-tensioning produces belt slip and premature belt failure.

Service kit supply

Ramair stocks the full range of service parts required to maintain installed kits across their working life. Belts, tensioners, idler pulleys, bearing components, and replacement compressors and alternators are held in inventory for same day dispatch on confirmed orders.

For application-specific service kits, quote the original Ramair kit part number when ordering. The service kit dispatched will match the original specification of the installed system.