RING 0787149 - Caterpillar

Illustration 1 g01279576
(10) Location of the switch for the operation of the sideshift
Illustration 2 g01279577
Mechanical sideshift
(10) Switch for the sideshift lock
Illustration 3 g01279580
Hydraulic Sideshift
(11) Locking tab for the sideshift
(12) Switch for the operation of the sideshift
Illustration 4 g01231044
Location of the pistons for slide lock
(4) Pistons for slide lock
Illustration 5 g01294476
The schematic is for the locked position of the sideshift slide lock valve.
(1) Pump passage
(2) Sideshift slide lock solenoid
(3) Line
(4) Pistons of the slide lock
(5) Slide rail
(6) Slide bar
(7) Hydraulic tank
(8) Outlet manifold for backhoe valve (Sideshift)
(9) Check valve Locked Position
The sideshift slide lock solenoid (2) is mounted to the outlet manifold of the backhoe valve (8). Solenoid valve (2) is controlled by the switch (10) for the sideshift lock. In order to de-energize the sideshift slide lock solenoid, the bottom of the switch (10) for the sideshift lock on mechanical sideshift machines. The locking tab for the sideshift (11) on hydraulic sideshift machines must be pressed. The solenoid is not energized in the locked position.Oil from hydraulic pump passage (1) causes check valve (9) to move to the right. When check valve (9) moves, the oil that is in line (1) flows past the check valve. The oil goes to line (3) and the oil flows into the piston for slide lock (4).Piston (4) moves right against slide rails (5) of the stabilizer frame . When the piston forces the slide rails to contact slide bars (6), the slide frame is prevented from moving during digging operations. The pressure to the piston of the slide lock is charged to the system pressure, whenever an implement or the steering system is used.Unlocked Position
When the backhoe needs to be repositioned, the pressure on the pistons of slide lock (4) must be released. When the operator depresses the top of the switch for the sideshift lock, sideshift slide lock solenoid (2) is energized.When the solenoid is energized, the solenoid allows the oil in line (3) to drain to hydraulic tank (7). Most of the pressure oil in line (1) is blocked at check valve (9). An orifice in the check valve allows a small amount of oil to flow past the check valve and through solenoid valve (2). The oil then flows back to the hydraulic tank.The oil to the cylinders in the sideshift slide lock solenoid (2) is free to return through solenoid valve (2) back to the hydraulic tank.