Stewart Warner Diesel/Alternator Tachometer 3-3/8” & 5” Installation Instructions

Installation Instructions
Diesel/Alternator Tachometer 3-3/8" & 5"
TACHOMETER MOUNTING (Figure 1 & 2):
NOTE: Instructions apply to 3-3/8" & 5" Tachometer.
Recommended panel cut-out (hole size) for 3-3/8" for the 3-
3/8" tachometer 4-5/8" for the 5" tachometer if recessed to the
bezel, or 3-3/8 if recessed to the step (figure 1).
Secure the tachometer in the hole using the supplied bracket
for the 3-3/8" and the 5". Remove the 3 Torx screws using a
T10 Torx driver. Insert the 3 studs (no more than 8 turns) and
install lock washers and nuts to secure the rear cover. Install
the bracket as shown in figure 2 and tighten the 3 locking nuts
(5 in. Lb. max).
TIP: Calibrate the tachometer before final installation.
When mounting on the dash or roll cage or steering column,
use the cushioned strap & bracket as shown in figure 3.
Figure 1
118031
Rev 1: 12/15/04
1
3
Figure 3
5

PRECAUTIONS:

Read ALL instructions before installing instrument.
Follow ALL safety precautions when working on vehicle-wear
safety glasses!
ALWAYS disconnect (-) negative battery cable before making
electrical connections.
HELP?:
If after reading these instructions you don't fully understand
how to install your instrument(s), contact your local Stewart
Warner distributor, or contact our Technical Support Team toll
free at 1-866-797-7223 (SWP-RACE).
Additional applications
www.SW-Performance.com

GENERAL APPLICATION:

12-volt DC negative (-) ground electrical systems (11-20 VDC
operating voltage range for the tachometer, 11-16 VDC for the
Light bulb).
Signal source from alternator AC tap (R terminal).
Adjustment range: 10.7 – 21.3 PPR (Pulses Per Revolution).
PPR = (Poles/2)*(Crank pulley dia./Alternator pulley dia.)

TACHOMETER HOOK-UP (Figure 3):

1. Disconnect negative (-) battery cable.
2. Using 18-ga. wire, connect the (BLACK) wire to a clean
(rust/paint-free) ground, preferably battery negative terminal.
3. Using 18-ga. wire, connect the (RED) wire to a switched +12V
source, like the ignition wire.
4. Using 18-ga. wire, connect the (GREEN) wire alternator AC tap
terminal (R terminal).
5. There are two (2) wires for the lighting; Connect the (WHITE)
lighting wire to the dash lighting circuit or to a +12V switched
circuit. Connect the (BLACK) lighting wire to a chassis ground.
Reconnect the negative (-) battery cable & test instrument to
6.
ensure that it is working (will not be accurate until calibrated).
7. Calibrate the tachometer. Refer to the calibration set-up
section.
Figure 2
3-3/8" Installation
information may be found
.
2
5" Installation
4
6
at