RIDGID Water Pump BW 1790 User Guide

Hydraulic Hand Pump, H-18  
Single-Stage,Two-Way Valve  
4
1
3
5
6
2
12  
1
7
8
13  
RESERVOIR CAPACITY  
22  
21  
20  
14  
15  
16  
Proper Oil Fill: 18.6 Cu. In. = 10.5 Ozs.  
Fill to between lines inside reservoir.  
9
10  
11  
19  
17  
17  
23  
32  
18  
26  
24  
28  
20  
27  
29  
30  
17  
31  
23  
25  
33  
34  
35  
High Pressure  
Relief (See  
Service Notes)  
36  
NOTE: Order parts by Catalog Number only.  
DO NOT order by Reference Number.  
NOTE: All components are METRIC dimensions.  
Ref.  
No.  
Catalog  
No.  
Ref.  
No.  
Catalog  
No.  
Description  
Description  
1
24542  
24497*  
24492  
24202  
24222  
24502  
24272  
24487  
24127  
24132  
24137*  
24142*  
24177  
24147*  
24182*  
24187*  
24192*  
24152*  
24227*  
24162  
H-18 Hand Pump  
Snap Ring (6)  
Pin  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
24157*  
24167  
24172  
24507  
24232  
24237  
21847  
24207  
24122  
24217  
24247  
24252  
24257  
24262  
24267  
24197  
24107  
O-Ring (2)  
Valve Guide  
Knob  
O-Ring (2)  
Reservoir  
2
3
Pin  
4
Handle Head  
Handle  
Hand Grip  
Lever Crank  
Piston  
Packing Nut  
Back-up Ring  
O-Ring  
Spring Stop Bolt  
Copper Washer  
Spring  
Steel Ball (6 mm)  
Spring  
Steel Ball (3) (4.8 mm)  
Copper Washer  
Valve Stem  
5
Reservoir Cap  
Hydraulic Hose, 3 ft.  
Pin  
6
7
8
Pump Body  
3
8
9
Elbow, 45 Deg., / NPTF  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
Valve Body  
Ball Guide  
Spring  
Jam Nut  
Adjusting Plug  
Intake Tube w/Filter  
Hose Half Coupler  
Following items not shown:  
26032*  
26067  
Decal, Trade Name  
Repair Kit (includes * items)  
Items marked with an asterisk (*) are included in the Repair Kit.  
†See Service Notes.  
Service Notes for H-18  
HIGH PRESSURE RELIEF VALVE SETTING  
The High Pressure Relief Valve on this pump is factory preset at 9,400 to 10,500 PSI. The setting can be checked or reset as follows:  
A. Attach a 15,000 PSI gauge to outlet port of pump.  
B. Operate pump cautiously to build pressure while watching gauge.  
C. If maximum pressure exceeds 10,500 PSI:  
1. Stop pumping and open release valve.  
2. Turn adjusting plug, Ref. 34, counterclockwise 1/2 turn and retest.  
D. If maximum pressure is less than 9,400:  
1. Turn adjusting plug clockwise 118 turn and retest.  
E. Continue Step “C” or “D” until specified range is achieved. Lock in place with jam nut, Ref. 33.  
Ridge Tool Company/Elyria, Ohio, U.S.A.  
62  
 

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