2549701 ENGINE AR-COMPLETE Caterpillar parts
C7
Rating:
Alternative (cross code) number:
CA2549701
254-9701
2549701
CA2549701
254-9701
2549701
TRUCK ENGINE,
Compatible equipment models: 2549701:
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Information:
40° Displacement Angle Adjustment
This shim adjustment is necessary to maintain an exact angle between the center lines of drive shaft (7) and center pin (4). In turn, this maintains the proper alignment between the barrel (2) and its pistons (6).
Setup Of Dial Indicator
(13) Gauge blocks. (14) Support.1. Place support (14) on a surface plate. Position the gauge blocks (13) on the support to get dimension (A). Set the indicator in position over the gauge blocks and zero the dial.
Measurement For Shim Thickness
(14) Support. (15) Cover. (16) Ring location. (17) Shims. (18) Boss.2. Position the mechanical drive group on support (14) so that boss (18) is located over the hole in the support. Place cover (15) (without the seal and O-ring) on the drive group. Do not install the ring at location (16). Slide drive group and support under the dial indicator. Add shims (17) to get a reading on the indicator between 0 and -0.10 mm (-.004 in).
Mechanical Drive Group
(15) Cover. (17) Shims.Lift-Off Limitation Adjustment (Cylinder Barrel To Port Plate Maximum Separation)
Spacer (3) to pin (4) clearance in combination with the compression springs (5) maintain the correct barrel (2) to port plate (1) maximum separation. This maximum separation limits leakage during start up and downhill operation.This adjustment procedure determines the correct size of spacer to get the distance (B) between the center pin (center of pivot head) and centering pin (12). With the correct distance (B), clearance (C) between spacer (3) and center pin (4) will be 0.10 to 0.25 mm (.004 to .010 in).
Setup Of Dial Indicator
(13) Gauge blocks. (19) Support.1. Place support (19) on a surface plate. Using gauge blocks (13), build up the dimension (B) as listed in the above chart. Set up the dial indicator and zero.
Installation Of Spacer
(1) Port plate. (2) Cylinder barrel. (3) Spacer. (20) Wire. (21) Cylinder.2. Using a piece of wire (20), guide the spacer (3) (minimum thickness) into center pin cylinder (21) of barrel (2). Place center pin in cylinder (21) without compression springs (5).
To avoid damage to center pin (4) and support (19) in the next step, place measuring kit cylinder (24) over support and lay cylinder on its side (horizontal).
Measurement For Spacer Thickness
(1) Port plate. (2) Cylinder barrel. (3) Spacer. (4) Center pin. (12) Centering pin. (19) Support. (22) Centering disc. (23) Lifting screws. (24) Measuring kit cylinder. (25) Centering hole.3. Insert barrel (2), spacer (3) and center pin (4) into the centering hole (25) in support (19). Stand cylinder in a vertical position. Insert centering pin (12) in port plate (1) and barrel (2). Position centering disc (22) [with two lifting screws (23)] over the port plate. Slide this assembly under the dial indicator.The dial indicator must read between -0.10 mm (-.004 in) and -0.20 mm (-.008 in). Each motor has four different sizes of spacers to get the correct center pin to port plate distance. There is a minimum spacer size. Each succeeding size of spacer is 0.10 mm (.004 in) thicker. Depending on the
This shim adjustment is necessary to maintain an exact angle between the center lines of drive shaft (7) and center pin (4). In turn, this maintains the proper alignment between the barrel (2) and its pistons (6).
Setup Of Dial Indicator
(13) Gauge blocks. (14) Support.1. Place support (14) on a surface plate. Position the gauge blocks (13) on the support to get dimension (A). Set the indicator in position over the gauge blocks and zero the dial.
Measurement For Shim Thickness
(14) Support. (15) Cover. (16) Ring location. (17) Shims. (18) Boss.2. Position the mechanical drive group on support (14) so that boss (18) is located over the hole in the support. Place cover (15) (without the seal and O-ring) on the drive group. Do not install the ring at location (16). Slide drive group and support under the dial indicator. Add shims (17) to get a reading on the indicator between 0 and -0.10 mm (-.004 in).
Mechanical Drive Group
(15) Cover. (17) Shims.Lift-Off Limitation Adjustment (Cylinder Barrel To Port Plate Maximum Separation)
Spacer (3) to pin (4) clearance in combination with the compression springs (5) maintain the correct barrel (2) to port plate (1) maximum separation. This maximum separation limits leakage during start up and downhill operation.This adjustment procedure determines the correct size of spacer to get the distance (B) between the center pin (center of pivot head) and centering pin (12). With the correct distance (B), clearance (C) between spacer (3) and center pin (4) will be 0.10 to 0.25 mm (.004 to .010 in).
Setup Of Dial Indicator
(13) Gauge blocks. (19) Support.1. Place support (19) on a surface plate. Using gauge blocks (13), build up the dimension (B) as listed in the above chart. Set up the dial indicator and zero.
Installation Of Spacer
(1) Port plate. (2) Cylinder barrel. (3) Spacer. (20) Wire. (21) Cylinder.2. Using a piece of wire (20), guide the spacer (3) (minimum thickness) into center pin cylinder (21) of barrel (2). Place center pin in cylinder (21) without compression springs (5).
To avoid damage to center pin (4) and support (19) in the next step, place measuring kit cylinder (24) over support and lay cylinder on its side (horizontal).
Measurement For Spacer Thickness
(1) Port plate. (2) Cylinder barrel. (3) Spacer. (4) Center pin. (12) Centering pin. (19) Support. (22) Centering disc. (23) Lifting screws. (24) Measuring kit cylinder. (25) Centering hole.3. Insert barrel (2), spacer (3) and center pin (4) into the centering hole (25) in support (19). Stand cylinder in a vertical position. Insert centering pin (12) in port plate (1) and barrel (2). Position centering disc (22) [with two lifting screws (23)] over the port plate. Slide this assembly under the dial indicator.The dial indicator must read between -0.10 mm (-.004 in) and -0.20 mm (-.008 in). Each motor has four different sizes of spacers to get the correct center pin to port plate distance. There is a minimum spacer size. Each succeeding size of spacer is 0.10 mm (.004 in) thicker. Depending on the