Severe-service Top Pad Bolt Kit
The following information is to assist you with installing the Hendrickson severe-service top pad bolt kit, No. 58821-026 on Primaax 230/460/690 rear air suspensions.
The procedure to install the severe-service top pad kit is done on one top pad connection at a time. All other suspension components are to remain connected during service. Failure to do so can cause the axle to rotate or shift, possibly damaging components or personnel.
Controlling Contamination
According to Caterpillar, the way equipment is maintained can contribute to contamination problems, especially in hydraulic systems. Cat offers these tips to help control contamination:
Safety Recalls
The National Highway Traffic Safety Administration (NHTSA) has issued the following recalls:
Viscous Fan Drive Fault
On certain Mack model chassis equipped with either an MP7 (U.S. 2007 emission compliant) or MP8 engine, a driver may experience an electronically controlled viscous fan drive full-time engagement (until the ignition key is cycled off and on), and an MID 128, SID 33, FMI 4 fault code may be logged.
Generally there are no cooling system problems associated with the full-time fan engagement, nor with the fault code.
To correct this condition, a new engine dataset has been developed and was implemented into production as follows:
