Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.
63 APPENDIX G Sample Preventive Maintenance Inspection Work InstructionsâLYNX
64 Publication Number PMP-01-02 Revision 06
65 PREVENTIVE MAINTENANCE PROCEDURES Introduction The preventive maintenance procedures and checklists contained in this document were assembled and defined with the assistance of Lynx Technicians, Training Assistants, Supervisors and other staff employees. The process of updating this document and our Preventive Maintenance Program is ongoing. Procurement of new equipment and/or technology, failure of systems and/or components as well as other factors can effect changes in our Preventive Maintenance Program. References for manufactureâs (OEM) recommendations and the Code of Federal Register (CFR) regulations are listed in each section, throughout the document. The practices and procedures contained in this manual are the LYNX vehicle maintenance standards for preventive maintenance inspections. The use of the PM form is considered a statement compliance with these practices and procedures. The Preventive Maintenance Inspection schedule cycle is as follows: Preventive Maintenance Inspection Type Mileage PM A 3,000 PM B 6,000 PM A 9,000 PM B 12,000 PM A 15,000 PM C 18,000 Program Goal: Complete all scheduled Preventive Maintenance Inspections within 300 miles of its schedule mileage.
66 PREVENTIVE MAINTENANCE PROCEDURES A Pre Shop Inspection Defines the observations of vehicle condition and is performed while the vehicle is still in the parking area and while the vehicle is being driven into the Maintenance shop. A1 Low Oil Light, Engine Light & Alarm B C Check low oil light and alarm: 1. Turn the master switch to the âONâ position. 2. The oil light and Engine light on instrument panel should come on and an alarm buzzer should sound. 3. Start the vehicle and allow the air pressure build up to at least 90 PSI before moving out of the parking area. Note! Verify fast idle operation. Note! Place the climate control switch in the âONâ position to allow the system to run so an accurate system check can be performed later in the inspection.
67 A2 Speedometer B C Check the speedometer condition and operation: ⢠Check the condition of the speedometer mounting, faceplate and pointer. ⢠Check the speedometer operation within the facility compound but do not exceed the speed limit while driving on the property. (10 MPH) Note! If speedometer does not work, refer this information to the Supervisor or Lead on duty so they can research any activity generated from the operator reports of the vehicle. References: CFR- Title 49, Subpart G Section 393.82. A3 Retarder Light B C Check the Retarder light on instrument panel for proper operation: 1. Drive the vehicle up to 10 MPH. 2. Then depress on the brake pedal. The Retarder Applied light should come with brake application. A4 Speed Switch Light B C Check the speed switch light on instrument panel for proper operation: Drive the vehicle up to 10 MPH then depress the brake pedal. The Speed Switch light on instrument panel should come on when vehicle slows down to 3 MPH.
68 Note! Speed switch light test applies to (Gillig) buses only. Test the rear door open and interlock safety feature; Turn the rear door switch to the open position. Rear doors should not open and interlock should not come on until vehicle slow down to 3 â 5 MPH. Note! The rear door safety and interlock test applies to (Gillig, Orion, and New Flyer) References: Gillig- Electrical Schematic Manual: Door Interlock Section. A5 Clean Radiator & Hydraulic cooler B C Clean Radiator & Hydraulic cooler: Park the vehicle out side of shop then use compressed air to blow dirt and debris out from between the radiator and hydraulic cooler coils and fins. When the radiator and cooler is cleaned out, blow out any debris from the outer perimeters of the radiator and cooler as well as the access panel grid. Note! Use protective safety equipment such as goggles and dust/mist respirator when blowing out radiator. Note! Do not blow out radiator while vehicle is inside the shop or while people not protected by personal safety equipment are present. A6 Fill Windshield Washer Bottle B C Pull the front of the vehicle into the shop and fill the windshield washer bottle with water. A7 Low Air Warning Light And Buzzer A B C Check the low air warning light and alarm for proper operation: 1. Pump the brake pedal to lower air pressure in air tanks, Alarm and warning light should come on when air pressure reaches between 75 â 65 PSI.
69 2. Check the PP1 valve for proper operation. 3. Release the PP1, pump the brake pedal to lower air pressures in air tanks, the PPI valve should pop and engage rear spring brakes when air pressure reaches between 60 â 35 PSI. Note! Record all findings on inspection sheet. Note! It may be necessary to chock the wheels when performing the PP1 test. References: CFR- Title 49, Subpart C Section 393.51. Gillig- Transit Coach Service Manual (1999): Air System. Pg. # 168. Orion- Bus Service Manual: Air System. Pg. # 12.66.N New Flyer- Bus Service Manual: Warning indicators â Air Systems. Pg. # 8-64 A8 Air Gauges & Governor Cut Off B C Check the air system governor cut out operation: 1. Pump the brake pedal to lower air pressure in air tanks to 90 PSI then allow air system to build pressure. 2. The air system governor should stop the system from building air when the pressure reaches 120±5 PSI. 3. The air dryer purge valve should release a burst of air once the air system reaches set cut out pressure, the air purge should not last more than 20 seconds. 4. Check cut in and build time after cut out by pumping brakes the difference between cut in and cut out pressure should not exceed 25PSI (cut in at 95±5PSI), drop pressure to 85 PSI it should take no more than 40 seconds for air to build to 100 PSI. Note! Observe the operation of the instrument panel air gauge while performing the above test and record findings on the inspection sheet. References: Gillig- Transit Coach Service Manual (1999): Air System. Pg. # 163 - 166. Orion- Bus Service Manual: Air System. Pg. # 12.1.1. New Flyer- Bus Service Manual: Air Systems > Pg. # 8-3. B Exterior Inspection Defines the observations of the vehicle exterior condition and is performed after the vehicle has been driven into the Maintenance shop. B1 Outside Rear View Mirrors A B C Check the condition of all outside rear view mirrors:
