ISSPRO R8902 - Manual

ISSPRO, INC. 2515 N.E. Riverside Way, Portland OR 97211
Telephone: (503) 288-4488 Š Toll Free: (800) 888-8065
FAX: (503) 249-2999
Form No. 235B (2/4/03 Rev. B) Page 1 of 2
R8902 Sensor Kit
For Nissan SD-22 Diesel Engine
Using R8504 Tachometer
INSTALLATION INSTRUCTIONS
1) Remove the splash pan to access the engine pulley. Scrape away the paint from two areas directly opposite
from each other on the rear of the pulley as shown on the back page. Roughen the bare metal with an emery
cloth. Clean the magnets and bare metal on pulley with alcohol to remove any oil or grease residue so that the
glue will bond. Glue each magnet to the selected surface of the pulley with the BLUE SIDE OUT (north
pole) and with the magnets directly across (180
° apart) from each other to maintain balance.
Suggested method for glue application:
Apply the glue to the area on the pulley where the magnet will set, then apply the accelerant (crush tube)
to the magnet face (non-blue side), then apply the magnet to glue area on pulley. Be sure to apply enough
glue to fill the gap between pulley and magnet. Repeat for other magnet. Let glue set for 10-15 minutes.
Follow the instructions on the glue packet enclosed in your kit to allow the proper glue curing time before
starting the engine.
2) Remove one of the front oil pan bolts (10mm) and use it to mount the Sensor Assembly. Position the sensor
so that there is approximately ⅛” to ¼” clearance between the end of the sensor and the magnets.
3) Connect two #20 AWG or larger wires (not supplied with the kit) to the two sensor wires and route them into
the cab to the tachometer. Locate wires away from starter wires, electric motor wires, etc. Secure the wires
along as necessary. (See NOTE below)
4) Replace the splash pan.
5) Mount the R8503 Tachometer (4,000) in the desired location using the optional bracket or other mounting
device. Connect the wires coming from the 3 wire cable as follows:
a) White wire to one of the sensor wires.
b) Black wire to the other sensor wire. Ground this connection as close as practical to the tachometer head.
c) Red wire to a fused ignition-switched +12 VDC source.
6) Connect the wires from the tachometer light as follows:
a) One wire to vehicle dash light circuit.
b) The other wire to clean ground.
7) Start the engine after double-checking all connections and clearances. The tachometer should now read the
engine RPM. No calibration is necessary.
NOTE: If only half the engine RPM is being displayed, check to make sure that two magnets were installed
and that both magnets are lined up with the center of the sensor. Also check that both magnets were
installed with the same pole out by comparing them to a third magnet. Both magnets should repel the same
pole of the third magnet. If a flicker or other interference is noted on the tachometer, reroute the extended
sensor wires. This should remove the interference. In severe interference cases, it may be necessary to use
2-wire shielded cable for the sensor wire extensions. Be sure to ground the shield at one end only.