VMAC – Vehicle Mounted Air Compressors
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□ Remove the idlers and tensioner from the main bracket (Figure
3.4). Place the main bracket in position on the front upper driver
side of the engine timing cover and align the mounting holes.
□ Adjust the air brake compressor cooling hose to clear the bracket
and tighten the fitting.
□ Install three M10 x 60 mm and one M10 x 35 mm flange head
bolts into the holes that originally held the fuel filter/primer pump
assembly and hand-tighten.
Make sure that the passenger side section of the
bracket is under the wiring harness and any hoses.
□ On the passenger side, install the steel brace bracket on the two
front bolt holes for the engine right side air cleaner bracket, with
the machined section of the brace bracket on top of the OEM
bracket and under the edge of the main bracket.
□ Insert the two OEM air cleaner mount bolts into the holes that
overlap the right side air cleaner bracket and two 3/8 x 1 inch
supplied bolts through the two forward holes.
□ On the V900078 system, insert two M10 x 25 mm hex head bolts
with flat washers through the top of the main bracket and thread
them into the brace bracket.
□ On the V910004 system, place the compressor remote air filter
mounting bracket over the VR bracket and insert two M10 x 30
mm socket head bolts with flat washers through the top of the
main bracket and thread them into the brace bracket.
□ Check the alignment of the brackets, snug the bolts down initially
using the following sequence and check for proper fit, then
tighten in the following sequence:
• two upper brace to cast bracket bolts
• four main casting bolts to the front of the engine
• four brace bracket bolts to the cylinder head
During tightening, make sure that alignment is correct
and there are no gaps. Do not use the bolts to force
gaps to close, check and correct the reason for the gap.