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MOTOR TRANSPORT MANUAL - CHP

 

California Highway Patrol

 

CHAPTER 3

MAINTENANCE

 

CHP EQUIPMENT.

 

a. Sirens - Electronic. Electronic sirens (part of the radio system), including motorcycle sirens, are to be repaired by technicians from the Department of General Services, Division of Telecommunications.

 

NOTE: Area personnel shall ensure that property and radio numbers are kept current on assignment papers (CHP 57) when replacement sirens are received.

 

b. Lightbars and Rear Deck Lights. Replacement lamps and flashers may be Requisitioned from Supply Services Unit, and a small supply may be maintained at each Area. Replacement and warranty parts shall be requested via comm-net from MTS, Sacramento.

 

c. Speedometers - Patrol Car. Speedometers on new vehicles (except motorcycles) are calibrated before leaving MTS. Speedometers are to be checked for accuracy at least every 30,000 miles or 90 days, whichever occurs first.

 

Calibration shall be done at earlier intervals should local jurisdiction require it. The first 90-day period shall commence with the date the vehicle is first placed in service. Speed readings are to be recorded on the vehicle's Speedometer Calibration Chart, CHP 227 or CHP 227A (Annex 3-A.)

 

d. Speedometer - Motorcycle. Motorcycle speedometers are certified at the Area using radar or an outside vendor (as described in this chapter) before placing the motorcycle in service. Speedometers are to be checked for accuracy at least every 30,000 miles or 90 days, whichever occurs first. Calibration shall be done at earlier intervals should local jurisdiction require. The first 90-day period shall commence with the date the vehicle is first placed in service. Speed readings are to be recorded on the vehicle's Speedometer Calibration Chart, CHP 227 or CHP 227A (Annex 3-A.)

 

e. Replacement Speedometers.

 

. (1) A speedometer found to be inaccurate by more than 4 miles per hour must be replaced.

 

(2) Replacement speedometers shall be obtained from the vehicle manufacturer's repair facility if under warranty or from the vendor using the Department's delegated purchasing authority. .

 

3-1                                                          HPM31.1

 

(3) If the replacement speedometer cannot be updated to display current odometer mileage, a decal recording the last odometer reading on the defective speedometer shall be affixed to the B-post per the vehicle manufacturer's instructions. On motorcycles, it should be placed on the face of the odometer without obscuring odometer and speedometer readings. The recorded and the displayed odometer readings shall be added together when reporting total mileage accrued on ail monthly reports.

 

f.  Speedometer Calibration Procedures.

 

(1) Speedometers on all new enforcement vehicles (except motorcycles) issued by MTS, Sacramento, are calibrated for accuracy by dynamometer rollers using a stroboscope. Motorcycle speedometers are not calibrated at. MTS and should be done at the Area before being placed into service, using the procedures outlined in this chapter. A completed Speedometer Calibration Chart (CHP 227/227A) accompanies each assigned vehicle.

 

(2) The speedometers of in-service enforcement vehicles and motorcycles shall be calibrated by one of the following methods:

 

(a) Radar (stationary mode only) speed measuring devices.

 

1. The use of radar speed measuring devices for the calibration of Speedometers shall be in accordance with Chapter 1 of the Radar Speed Enforcement Manual, HPM 100.4.           

 

2   Radar speed measuring devices used for calibration of speedometers shall only be operated by departmentally certified radar operators as described in Chapter 6 of HPM 100.4.

 

(b) The use of a stopwatch and a measured mile.

 

(c) Contracting with an outside vendor to provide for speedometer calibration service, e.g., automotive clubs.

 

1   Areas shall obtain approval from their local court(s) and district attorney's office(s) prior to utilizing an outside vendor.

 

2  A new CHP 227/227A shall be prepared for each calibration.

 

g. Radio Equipment. Maintenance and repair of radios, extenders, vehicular repeater systems, scanners and radio-connected public address units are the responsibility of Department of General Services (DGS), Division of Telecommunications.

 

HPM 31.1 3-2

 

 

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