Speeflo 449-500, Руководство пользователя

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Hydraulic Motor Service Instructions
Disassembly
1. Disconnect the high pressure hose line from the elbow (31,
in Hydraulic System parts list) on the back of the rotary
pump.
2. Remove the two mounting screws (27 and 34, in Cart Assembly
parts list), and two lock washers (26, in Cart Assembly parts list)
that attach the motor pump assembly to the frame.
3. Place the motor pump assembly in a vise, holding it securely
by the motor pump block (25, in Hydraulic Motor parts list).
Disassembly of Hydraulic Motor
Disassembly of the hydraulic motor must be carried out in an
absolutely clean area. Any dust or metallic particles left in the
motor or entering it on reassembly may damage the critical parts
and affect its service life and warranty. If the hydraulic motor is
operable, start the machine and place the piston rod (21) in its
top position. The numbers in parentheses refer to the Hydraulic
Motor parts list on the following page.
1. Remove cylinder head plug (7).
2. Loosen lock ring (22) with a spanner wrench and unthread
tube retaining nut on tee (27). Loosen tube retaining nut on
elbow (15). Slide the nut down. Push motor tube (26) into
tee (27) far enough to clear elbow (15). Slowly unthread
cylinder head (11) and Iift it just high enough above the
cylinder (23) to reach the valve rod assembly (20) with vise
grip pliers.
3. The piston rod (21) should be near the top of its stroke for
disassembly. It may be necessary to use a wood or nylon
driver to push the piston rod up to its top position.
4. Grip the valve rod securely with vise grip pliers and then
remove the FlexLoc nut (9) from the top of the valve rod
assembly (20). Be careful that spool (5) does not fall. The
cylinder head (11) can now be lifted off. Unthread the
cylinder (23) from the motor pump block (25). Note: An extra
lock ring (22) can be used to jam the two lock rings together
on the cylinder and a pipe wrench can be used to unthread
the cylinder (23) from the motor pump block (25).
5. To remove connecting rod pin (2, in Fluid Pump parts list),
slide the ring up with a small screwdriver, and then push the
connecting rod pin out (see illustration on pg. 24).
6. Remove the piston rod assembly from the motor pump block
(25).
7. Remove rod seal (24), being extremely careful not to scratch
the seal groove in the motor pump block (25).
8. Place the piston retainer screw (16) on the piston rod
assembly in a vise. Slide a long bar through the hole at the
base of the piston rod for leverage, and unthread the piston
rod from the piston retainer screw.
9. Remove piston (17) and lift out valve rod assembly (20).
10. Remove piston seal (18) and o-ring (19).
11. Remove trip retainers (1), trip springs (3), and balls (4) from
cylinder head (11). Remove o-rings (2) from trip retainers (1).
12. Remove retaining ring (14) and sleeve retainer (13). Gently
tap spool/sleeve set (5) out of cylinder head (11) using a
wood or nylon rod.
13. Inspect piston rod (21) and cylinder (23) for wear, scratches,
and dents. Replace if damaged.
14. Inspect spool valve (5) for wear. Replace if necessary. spool
valve should move smoothly and freely with no force by
holding in a vertical position. If it does not, it can cause the
motor to stall.
NOTE: Reassembly of this motor should be carried out in
a clean, dust free area only. It is recommended
that a full “Motor Service Kit, Minor” (P/N 235-050)
be on hand. All parts should be inspected for
absolute cleanliness. Any paricles of dust or metal
will affect the service life of the sealed motor and
hydraulic system.
Hydraulic Motor
Torque flex locknut to
10 ft./lbs. (146N/m).
Use blue Loctite.
Use blue
Loctite on
lock ring.
Use
hydraulic
sealant.
Seal lip must
face up.
Use
hydraulic
sealant.
Torque head plug to
15 ft./lbs. (219 N/m).
Do not over-tighten
o-ring seal.
Torque trip
retainers to
15 ft./lbs. (365 N/m).
Do not over-tighten
o-ring seal.
Torque piston
retainers to
75 ft./lbs. (1095 N/m).
Use red Loctite.
Seal lip must
face down.
Valve rod assembly
is factory set and
permanently Loctited.
Do not disassemble.