Operation and maintenance manual

General Cleaning Instructions QSB4.5 and QSB6.7
Page i-12 Section i - Introduction
pressure water or steam clean the parts before putting them in the cleaning tank. Removing the heaviest dirt before
placing in the tank will allow the cleaner to work more effectively and the cleaning agent will last longer.
Rinse all the parts in hot water after cleaning. Dry completely with compressed air. Blow the rinse water from all the
capscrew holes and the oil drillings.
If the parts are not to be used immediately after cleaning, dip them in a suitable rust proofing compound. The rust
proofing compound must be removed from the parts before assembly or installation on the engine.
Steam Cleaning
Steam cleaning can be used to remove all types of dirt that can contaminate the cleaning tank. It is a good method for
cleaning the oil drillings and coolant passages
WARNING
When using a steam cleaner, wear safety glasses or a face shield, as well as protective clothing. Hot steam
can cause serious personal injury.
Do not steam clean the following components:
• Electrical Components
• Wiring Harnesses
• Belts and Hoses
• Bearings (ball or taper roller)
• Electronic Control Module (ECM)
• ECM Connectors
• Capacitive Coil Driver Module (CCD)
• Ignition Coils and Leads
• NOx Sensor
• Fuel Control Valve
• Throttle Driver and Actuator.
Plastic Bead Cleaning
Cummins Inc. does not recommend the use of glass bead blast or walnut shell media on any engine part. Cummins
Inc. recommends using only plastic bead media, Part Number 3822735 or equivalent on any engine part. Never use
sand as a blast media to clean engine parts. Glass and walnut shell media when not used to the media
manufacturer's recommendations can cause excess dust and can embed in engine parts that can result in premature
failure of components through abrasive wear.
Plastic bead cleaning can be used on many engine components to remove carbon deposits. The cleaning process is
controlled by the use of plastic beads, the operating pressure and cleaning time.
CAUTION
Do not use bead blasting cleaning methods on aluminum pistons skirts or the pin bores in any piston, piston
skirt or piston crown. Small particles of the media will embed in the aluminum or other soft metal and result in
premature wear of the cylinder liner, piston rings, pins and pin bores. Valves, turbocharger shafts, etc., can
also be damaged. Follow the cleaning directions listed in the procedures.
CAUTION
Do not contaminate wash tanks and tank type solvent cleaners with the foreign material and plastic beads.
Remove the foreign material and plastic beads with compressed air, hot high pressure water or steam before
placing them in tanks or cleaners. The foreign material and plastic beads can contaminate the tank and any
other engine parts cleaned in the tank. Contaminated parts may cause failures from abrasive wear.
Plastic bead blasting media, Part Number 3822735, can be used to clean all piston ring grooves. Do not sure any
bead blasting media on piston pin bores or aluminum skirts.
Follow the equipment manufacturer's cleaning instructions. Make sure to adjust the air pressure in the blasting
machine to the bead manufacturer's recommendations. Turning up the pressure can move material on the part and
cause the plastic bead media to wear out more quickly. The following guidelines can be used to adapt to
manufacturer's instructions:
1 Bead size: U.S. size Number 16 — 20 for piston cleaning with plastic bead media, Part Number 3822735