INSTRUMENTATION SERVICE MANUAL NUMBER 23
Page 4D-8 90-861326--1 MARCH 1999
CALIBRATION CHART
Air Pressure Gauge psi Speedometer Gauge MPH (km/Hr)
5.3 20±2 (32±1.6)
27.8 45±1 (72±1.6)
Tachometer
TESTING
1. Connect a service tachometer to engine and compare readings.
2. Replace if not within specifications.
Tachometer
Allowance
6000 rpm ± 150 rpm
8000 rpm ± 200 rpm
Gauge Replacement
1. Disconnect battery cables from battery.
2. Remove wires from back of gauge.
3. Remove hoses (vacuum, speedometer gauge).
4. Disconnect light socket.
5. Remove holding strap and remove gauge.
6. Position gauge assembly in appropriate mounting hole.
7. Install holding strap and nuts. Tighten nuts evenly and securely.
IMPORTANT: Do not distort case or bracket by overtightening.
8. Connect ground (BLACK) wire to ground terminal, if gauge is not mounted in metal
panel.
9. Connect other wires to gauge as shown in SECTION 4E.
10. Connect hoses (vacuum, speedometer gauges).
11. Install gauge light socket.
12. Coat all terminals with Quicksilver Liquid Neoprene.
13. Reconnect battery cables to battery.
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