Domestic
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1. ECHLIN og C378 FMC Corporation Motor Coach Division 333 Brokaw Road Box 664 Santa Clara California 95052 O URGENT O MANDATORY OF tn a L Poice Bulletin DATE _18 November 1974 NUMBER O ROUTINE G INFORMATIONAL 2939 40002 ATTENTION SERVICE MANAGER AND OWNERS DESCRIPTION This Service Bulletin modifies the domestid battery charging input and ground circuitry by replace ment of theconverter fuse with a brass conducting link slug and installation of a 40 ampere circuit breaker thermal reset type in the battery ground line This modification minimizes the affects of high current spikes emmiting from the converter during APU starting or stopping COMPLIANCE Dealers should comply with this bulletin prior to delivery of coach to owner Present owners should return coach to dealer for this modification as soon as practicable MANPOWER Estimated accomplishment time for one mechanid ee is one hour WARRANTY REIMBURSEMENT FMC Motor Coach Division will allow a maximum of one labor hour and reimbursement for Kit 5106857 R001 on a properly submitted Warranty Claim Form RVD 69 for this modification Authorization for dealers to proceed must be obtained from the Motor Coach Division Service Department prior to performing the work KIT CONTENTS 5106857 R001 ITEM NO QTY PER COACH MCD P N 5106857 40amp M 15258 M 17172 M 17171 M 14251 M 17052 M 17047 Link conducting Circuit breaker Nut CB2. stud Lockwasher CB stud Screw CB attach Nut CB attach screw Lockwasher CB attach nut Screw Gnd cable attach M 18061 Nut Gnd attach screw M 17040 or M 17070 Lockwasher Gnd nut M 17144 Cable assy batt to CB 5106858 01 Cable assy CB to gnd 5106858 02 RVD 84 6 73 Page l of 5 SUBJECT MODIFICATION OF DOMESTIC BATTER CHARGING AND GROUND CIRCUITR MODEL S AFFECTED 00001 to 00645 2900R MOTOR HOME AND 2900C CLUB COACHES Factory Use Only Information added to OWNER MANUAL S SERVICE MANUAL S PARTS MANUAL S WARRANTY MANUAL S OTHER A MG eson C URGENT O ROUTINE 333 Brokaw Road Box664 Santa Clara California 95052 O MANDATORY k INFORMATIONAL DATE _18 November Sprice Bulletin NUMBER 2939 40002 ATTENTION SERVICE MANAGER AND OWNERS 39 ACCOMPLISHMENT INSTRUCTIONS l Remove AC power from coach APU inoperative and SUBJECT service line disconnected Turn off all DC operated domestic components and position the refrigerator thermostat knob to the OFF position Replace converter 50 ampere fuse with conduct ing link item 1 as follows a Gain access to converter bus fuse clips by MOPEEISI opening the hinged access door on the front of the converter Locate and remove 50 amp fuse largest fuse in converter Insert conducting link Item 1 in fuse holder clips then solder in place at both upper and lower clip Factory Use Only Information Clos
3. alifornia 95052 1 MANDATORY kJ INFORMATIONAL s rommethgrecce Bu A DATE NUMBER 2939 40002 ATTENTION SERVICE MANAGER AND OWNERS Drill 1 4 inch diameter hole in forward wal of battery compartment about 4 inches to the inboard and slightly lower than circuit breaker Grind or sand off area around hold to insure good ground connection for next step Qu SUBJECT Attach the 1 4 inch ID ring end of cable assembly item 12 to mount hole drilled in previous step with screw item 8 lock washer item 10 and nut item 9 MODEL S AFFECTED Attach opposite end of cable item 12 to inboard terminal stud of circuit breaker with lockwasher item 4 and nut item 3 Attach the ring end of cable assembly item 11 to the outboard copper terminal stud of the circuit breaker with lockwasher item 4 and nut item 3 Factory Use Only Information added to Install cable item 11 terminal clamp on negative post of the forward battery and tighten clamp nut Coat cable clamp with light mineral grease OWNER MANUAL S Install cover over battery compartment SERVICE MANUAL S Start APU to energize the system and check that components in the affected circuit operate PARTS MANUAL S CAUTION WARRANTY MANUAL S If domestic batteries have been left dis connected for an extensive period and AC powe
4. e converter access door added to Modify the forward domestic battery ground lead as follows OWNER MANUAL S Remove access cover from domestic battery compartment SERVICE MANUAL S Loosen cable clamp nut and using a screw type cable puller disconnect existing PARTS MANUAL S ground lead from forward battery negative ssi terminal and cut off at opposite end at the ground screw on the inboard wall of the WARRANTY MANUAL S battery compartment discard lead NOTE f OTHER Do not remove the smaller white lead refrigator ground from the ground screw retighten ground screw nut with white lead remaining connected See Figure 1 Install circuit breaker as shown with the copper terminal stud out board on forward wall of compartment by attaching through existing vent slot with two screws item 5 two lockwashers item 7 and two nuts item 6 RVD 84 6 73 Page_2_of 5 HB PMG EE so O URGENT O ROUTINE 333 Brokaw Road Box 664 Santa Clara California 95052 O MANDATORY G INFORMATIONAL Service Bulletin DATE 18 November 1974 NUMBER 2939 40002 P ATTENTION SERVICE MANAGER AND OWNERS GRON 39 SUBJECT MODEL S AFFECTED Factory Use Only Information added to OWNER MANUAL S SERVICE MANUAL S PARTS MANUAL S WARRANTY MANUAL S OTHER FIGURE 1 MODIFICATION OF DOMESTIC BATTERY GROUND LEAD RVD 84 6 73 Page 3 of pas eMC rA r O URGENT O ROUTINE 333 Brokaw Road Box 664 Santa Clara C
5. r has not been applied during the in terval the refrigerator warms up to a point where it will draw excessive DC current when initially energized by the reconnected batteries To prevent ex cessive battery drain due to the above reason after modification is completed apply AC power to the coach then position refrigerator thermostat to the number 3 setting and operate until the unit cycles off Setting the refrigerator thermostat OTHER RVD 84 6 73 Page _4of _2 age NIC Ce a O URGENT O ROUTINE 333 Brokaw Road Box 664 Santa Clara California 95052 O MANDATORY E INFORMATIONAL P Sewice Bulletin DATE November 1974 NUMBER GROUP ATTENTION SERVICE MANAGER CAUTION CONT 2939 40002 SUBJECT to 3 and driving the coach for approximate ly two hours immediately following reconnec tion of the domestic batteries will also prevent excessive battery drain as the automotive alternator will then be provid ing the refrigerator operating voltage MODEL S me Ynarely AFFECTED MAX L ee aL oe Manager Factory Use Only Information added to OWNER MANUAL S SERVICE MANUAL S PARTS MANUAL S WARRANTY MANUAL S RVD 84 6 73 Page of 5
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