ISSPRO R8506 - Manual

ISSPRO, INC. 2515 N.E. Riverside Way, Portland OR 97211
Telephone: (503) 288-4488  Toll Free: (800) 888-8065
FAX: (503) 249-2999
Form No. IS012 (08/16/2012 Rev. D) Page 1 of 2
Installation Instructions for the R8506
Torque Converter Tachometer Kit
General Information:
Operating Voltage: 10-16 VDC
Signal Output: R8941 Sender (300084 Sender Sub-Assembly)
Gauge: R8505 3 3/8” Tachometer
Reverse Voltage Protected
Calibration:
No calibration is necessary.
Mounting Instructions:
a. Ensure proper size drive tang is inserted fully into slotted shaft. The drive tang is
snapped into place but is free to move, allowing for normal eccentricity.
b. Carefully insert the tip of the male drive tang into the female drive and screw the
sender down finger tight. Tighten sender fitting securely; torque must not exceed
200-inch pounds (22.6 newton meters, 15 lb-ft max).
NOTE: The sender can be mounted in any position and works equally well in either
direction of rotation.
Maintenance:
No routine maintenance is required for the sender. If it is installed in a harsh or severe
environment, check terminations for clean and secure connections. The snap-in drive
tang may be easily replaced if worn.
Troubleshooting Hints:
a. If the tach does not operate, but the needle “bumps” when power is applied, the
trouble is probably in the sender or its wiring.
b. A resistance check of the sender should give a reading of between 250 and 300 ohms.
Higher or lower readings indicated either a faulty sender or wiring. The wires do not
have to be disconnected from the tachometer to obtain a proper reading.
c. If the tach reads low, check the supply voltage while the engine is running. It should
be between 13.5 and 14.5 VDC. If a lower (or higher) voltage is observed, a problem
exists in either the installation or the vehicle electrical system.