3.9.21 ECU Replacement Continued.
Exercise care when using pry bar. Damage to LMS skin could occur.
(6) Using a pry bar and a piece of 2X4 placed against LMS to prevent damage, pry apart LMS and
cab support. Insert a block of wood approximately 1-1/2 inches wide. Do this on both sides.
(7) Remove sealant from screws heads and remove ten screws (11), ten lockwashers (12) and ten
flat washers (13) securing ECU (14) to two angle mounts (15 and 16). Discard ten lockwashers
(8) Remove five hinge pins securing ECV windshield.
(9) Remove eight screws and two brackets from bottom of windshield.
(10) Carefully place windshield on seat.
(11) Move lifting loop to front notch and attach pallet lifting fork to overhead lifting device.
(12) Carefully place forks under ECU with left tine placed 21 3/4 inches from left side of ECU. Right
tine should be 23 inches from right side.
Inspect straps for damage, frays, or cuts. Do not use tie down straps for lifting.
Using safety strap, run strap around ECU and pallet lifting forks and tighten.
Attach guide straps to sides from ECU.
Lift ECU slightly to relieve weight from mountings.
Remove twelve screws (17), twelve lockwashers (18) and twelve flat washers (19) securing
passenger side and driver side of ECU (14) to LMS. Discard twelve lockwashers (18).
Remove ten screws (20), ten lockwashers (21) and ten flat washers (22) securing passenger side
and driver side of ECU (14) to LMS. Discard ten lockwashers (21).
Remove fifteen screws (23), fifteen lockwashers (24) and fifteen flat washers (25) securing
mount plate (26) to ECU (14). Discard fifteen lockwashers (24).
To prevent damage to equipment, verify that all (ABS inflation and hydraulic) tubes, hoses
and electrical connectors are removed or disconnected prior to removing ECU.
Exercise care when prying ECU from LMS. Damage to LMS skin could occur.
(19) Using a pry bar on LMS corner lifting plates, pry ECU slightly away from LMS.
(20) Position a safety strap around pallet lifting fork from front to back of ECU and tighten.
(21) Lift and remove ECU (14). Place ECU on suitable surface that will allow three inches of
clearance for hoses attach to bottom of ECU.
Remove/disassemble only to the extent necessary to remove or replace defective
assemblies/components. Use standard maintenance shop practices/procedures.
(1) Remove twelve screws (27), twelve lockwashers (28), and twelve flat washers (29) securing boot
mounting frame (30) and outlet air boot (31) to ECU (14). Discard twelve lockwashers (28). Pull
boot free of sealant