21
Voltage Coil Resistance
6 DC 1.3 Ohms
12 DC 4.9 Ohms
24 DC 19.6 Ohms
48 DC 78.4 Ohms
115 DC 412 Ohms
230 DC 1680 Ohms
115 AC (60 Hz) 37 (3S) 30.5 (3) Ohms
230 AC (60 Hz) 154 (3S) 129 (3) Ohms
460 AC (60 Hz) 637 (3S) Ohms
Table 8. Coil Resistance
J. Assembly
Before assembly, obtain the correct seal kit as noted in the
parts drawing. Lubricate all ‘‘O’’ rings and internal parts with
clean system fluid to provide initial lubrication and facilitate
assembly.
Check the model code to determine correct assembly of
units. If a L.H. suffix appears in the model code, the pilot
valve solenoid is assembled left hand. Refer to service
drawing for parts orientation.
Assembly will be in reverse of the disassembly sequence
shown in Figures 17 and 18 unless otherwise specified.
K. General Main Stage Assembly (Refer to Figure 17)
1. Install ‘‘O’’ rings (18 and 19) on plugs (16 and 17).
Lubricate plug threads and install plugs into body (3).
Torque plugs to value noted in parts drawing. Refer to
Table 1.
2. Tap new rest pin(s) (13) into place if removed during
disassembly.
3. Install ‘‘O’’ ring (11) into ‘X’ and ‘Y’ port mounting
grooves.
4. Install ‘‘O’’ rings (12) into port mounting grooves ‘A’, ‘B’,
‘P’ and ‘T’.
5. Lubricate spool lands with clean system fluid and then
carefully install spool (10) into main body bore. Make
sure the spool moves freely inside the body bore and is
oriented properly. (See parts drawing).
Note
Spring (8) and washer (9) do not exist on spring offset ‘A’
or ‘floating’ type models.
6. Install washer (9) and spring (8) on end of spool (10).
7. Install ‘‘O’’ ring (7) into body (3) as shown.
8. Install cover (6) on body (3) with four screws (5). Torque
the screws to value noted in parts drawing. Refer to Table
1. Make sure cover is oriented properly (in line with body
contours).
Note
Repeat steps 6 through 8 for opposite side cover
assembly.
L. Pressure Centered Main Stage Assembly
(Refer to Figure 18)
1. Install ‘‘O’’ rings on plugs. Lubricate plug threads and
install plugs and set screws into body (3). Torque plugs
to value noted in parts drawing. Refer to Table 1.
2. Tap new rest pin(s) (27) into place if removed during
disassembly.
L. Check Valve Models
(Refer to Figure 18)
Note
The following step pertains to integral check valve models
only.
3. Place spring (23) into poppet (22) and then install poppet
into pressure port (P) cavity as shown. Obtain a suitable
push rod and press seat (21) into pressure port (P)
cavity. (See assembly drawing for seat orientation.) Use
an arbor press for this operation. Install ‘‘O’’ ring (20) into
pressure port mounting groove.
4. Install ‘‘O’’ ring (26) into ‘X’ and ‘Y’ port mounting
grooves.
5. Install ‘‘O’’ rings (25) into port mounting grooves ‘A’, ‘B’
and ‘T’.
6. Install ‘‘O’’ ring (24) in port mounting groove ‘W’.
7. Lubricate spool lands with clean system fluid and then
carefully install spool (9) into main body bore. Make sure
the spool moves freely inside the body bore and is
oriented properly. (See parts drawing).
8. Install piston (12), sleeve (11) and spring (10) into cover
(7).
9. Install ‘‘O’’ ring (8) in body (3).
10. Install cover (7) on body (3) with four screws (6). Torque
the screws to the value noted in parts drawing. Refer to
Table 1.
11. Install ‘‘O’’ ring (17), centering washer (16) and spring
(15) in body (3).
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