Gradall 544D (9136-4003) Service Manual - Manual (Page 94)

Figure 4-28. Model RD30 Differential Poppet Work Port Relief Valve (Non-Adjustable).
MODEL RD30 DIFFERENTIAL POPPET WORK PORT RELIEF VALVE (NON-ADJUSTABLE)
REPLACEMENT KIT (Contains items 2 thru 5)
CAP, Relief
SEAL, O-Ring
SEAL, O-Ring
RING, Back-Up, Cut
SEAL, O-Ring
BODY, RD30 Relief
SHIM (.010 inch [0,25 mm] thick)
SHIM (.020 inch [0,5 mm] thick)
SHIM (.040 inch [1,0 mm] thick)
POPPET
SPRING (500-1249 PSI [34-86 bar] crack)
SPRING (1250-1749 PSI [86-121.bar] crack)
SPRING (1750-1999 PSI [121-138 bar] crack)
SPRING (2000-2599 PSI [138-179 bar] crack)
SPRING (2600-2999 PSI [179-207 bar] crack)
SPRING (3000-3500 PSI [207-241 bar] crack)
Item
No. Part
No.
Description
Quantity
Per Assembly
*Buna-N seals are standard for all Gresen valve assemblies. For Viton seals contact the factory.
4-24
K-7521*
1880-001
2707-001*
1615-001*
6619-001
6815-002*
12066-001
0462-001
0459-001
0458-001
3936-001
1869-001
7638-001
7078-001
1870-001
7497-001
11912-001
1
2
3
4
5
6
7
8
9
1
1
1
1
1
1
A/R
A/R
A/R
1
1
1
1
1
1
1
TORQUE RELIEF
VALVE ASSEMBLY TO
18-22 FT.-LBS.
[24-30 Nm]
Not sold seperately.
Order K-7522*