Dynojet 424xLC2: Installation Guide - Manual (Page 174)

A P P E N D I X D
Bridge Extension Installation
Above Ground Model 424x/424xLC
2
Automotive Dynamometer Installation Guide
D-2
BRIDGE EXTENSION INSTALLATION
The optional bridge extension assembly (P/N 61119183) is used to extend the bridge
range from an 88-130 inch wheel base to a 98-140 inch wheel base.
1 Secure the extended runner mount (z-shaped bracket) to the drum guard using
three 3/8 x 1.5-inch flange hex allen bolts.
Note: The extended runner mounts used with the bridge extension are longer
than the standard runner mounts. Be sure to use the correct runner mounts.
2 Install the two inner brace mounts to the dyno using two 3/8 x 1.5-inch flange
head bolts each.
3 Secure the outer brace mount to the side of the dyno without the eddy current
brake using two 3/8 x 1.5-inch flange head bolts each.
4 Secure the remaining inner brace mount to the eddy current brake using two 
3/8 x 1.5-inch flange head bolts and two 3/8-inch nylock nuts each.
Note: If you do not have an eddy current brake, you will use an outer brace
mount. Secure this directly to the dyno using the same hardware. Refer to Figure
D-2 on page D-3. In this case, there will be one left over inner brace mount.
Figure D-1: Install the Extended Runner Mount and Brace Mount
A 561 D
extended runner
mount
outer brace
mount
inner brace
mount