HIGH OUTPUT FEATURES WITH REMOTE SENSE
™
40SI
: 12 Volt 240 - 275 - 300 Ampere Ratings
™
55SI
: 12 Volt 420 Ampere Rating
WARNING!!!!ALWAYS USE PROPER EYE PROTECTION WHEN PERFORMING ANY MECHANICAL REPAIRS TO A VEHICLE –
INCLUDING, BUT NOT LIMITED TO, ANY INSTALLATION AND OR REPAIRS TO THE DELCO REMY
USE PROPER EYE PROTECTION CAN LEAD TO SERIOUS AND PERMANENT EYE DAMAGE.
Only perform the mechanical functions that you are properly qualified to perform. Mechanical repairs that are beyond your technical
capabilities should be handled by a professional installation specialist.
DANGER!!!
To avoid injury or damage, always disconnect the negative cable at the battery before removing or replacing the alternator.
The alternator output terminal is always live ("hot"). If the battery is not disconnected, a tool accidentally touching this terminal and
ground can quickly get hot enough to burn skin or damage tools and surrounding parts.
FOLLOW ENGINE OR VEHICLE MANUFACTURER'S INSTRUCTIONS FOR REMOVING THE OLD ALTERNATOR FROM THE
ENGINE AND INSTALLING THE NEW ALTERNATOR.
NOTICE!
These are extremely high amperage output Alternators. Always ensure your application is equipped with the
appropriate size and gauge of cable. See "Recommendation for Determining Appropriate Cable Size" with the wiring diagram
in Figure 2 to determine if installation is acceptable.
REMOVAL & INSTALLATION INSTRUCTIONS
Disconnect the negative (-) cable at the batteries.
Identify and tag all leads when removing the old alternator and install them on the same terminals of the new alternator.
Insure all leads are reconnected or contained where they cannot ground.
Torque all fasteners to values labeled in Figure 1 below.
This alternator may have more terminals than the one being replaced had or used. It will charge properly with only the battery and
ground leads connected. Use of the other terminals is optional based on need. See "TERMINAL DESCRIPTIONS", Page 2.
FIGURE 1 - 40SI™ & 55SI™ Alternator Torque Values
GROUND SCREWS (-) (Three Locations)
40SI 6.8 - 10.2 Nm (60 - 90 lb in)
55SI 5.8 - 6.8 Nm (50 - 60 lb in)
USE PULLEY FROM OLD
ALTERNATOR (SEE PULLEY
INSTRUCTIONS BELOW)
40SI AVAILABLE IN DELCO REMY
STANDARD HINGE & LONG HINGE
MOUNTING SIZES
NOTICE
- Only licensed Delco Remy products and component parts should be used, and the use of other parts or modifications not approved by PHINIA
will void all applicable warranties. The failure to carefully follow these Instructions, set forth herein, will void all applicable warranties. DELCO REMY is a
registered trademark of General Motors LLC, licensed to PHINIA Technologies Inc.
© 2023 PHINIA Inc. All rights reserved
™
™
40SI
& 55SI
ALTERNATOR INSTALLATION INSTRUCTIONS
™
TECHNOLOGY
24 Volt 250 - 275 Ampere Ratings
Grd
198 mm (7.8")
or
216 mm (8.5")
®
Three Mounting Options: Pad, Delco Remy
Standard Hinge 198mm (7.8 inch) & Long Hinge
216mm (8.5 inch)
Mounting Option: Pad
1
Instruction Sheet
10523421
08FE24 C0008709 REV6
®
®
ALTERNATORS. FAILURE TO
™
REMOTE SENSE
INDICATOR/IGNITION
Grd
RELAY
(3 Terminals)
1.7–2.8 Nm (15–25 lb in)
Grd
BATTERY (+)
9.0–13.5 Nm
(80–120 lb in)