RIDGID BW-1790 dimensions Single-Stage, Two-WayValve, Service Notes for H-18

Hydraulic Hand Pump, H-18

Single-Stage, Two-Way Valve

	4
3	1
	5	6

2

1	7	12
		13
	8			22
	9	14
		15		21
	10	16		20
			17	19
	11	17
				23
		18
26
27	28			20
				30

29	17
	31
	32 33
	35
	36

RESERVOIR CAPACITY

Proper Oil Fill: 18.6 Cu. In. = 10.5 Ozs. Fill to between lines inside reservoir.

24

23

34 25

High Pressure

Relief (See

Service Notes)

NOTE: Order parts by Catalog Number only. DO NOT order by Reference Number.

Ref. Catalog

No. No. Description

—24542 H-18 Hand Pump

1	24497*	Snap Ring (6)
2	24492	Pin
3	24202	Pin
4	24222	Handle Head
5	24502	Handle
6	24272	Hand Grip
7	24487	Lever Crank
8	24127	Piston

924132 Packing Nut

1024137* Back-up Ring

1124142* O-Ring

1224177 Spring Stop Bolt

1324147* Copper Washer

1424182* Spring

1524187* Steel Ball (6 mm)

1624192* Spring

1724152* Steel Ball (3) (4.8 mm)

1824227* Copper Washer

19 24162 Valve Stem

NOTE: All components are METRIC dimensions.

Ref.	Catalog	Description
No.	No.
20	24157*	O-Ring (2)

2124167 Valve Guide

2224172 Knob

23	24507	O-Ring (2)
24	24232	Reservoir

2524237 Reservoir Cap

2621847 Hydraulic Hose, 3 ft.

2724207 Pin

28	24122	Pump Body
29	24217	Elbow, 45 Deg., 3/8″ NPTF
30	24247	Valve Body
31	24252	Ball Guide
32	24257	Spring
33	24262	Jam Nut

3424267 Adjusting Plug

3524197 Intake Tube w/Filter

3624107 Hose Half Coupler

Following items not shown:

26032* Decal, Trade Name

26067 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.

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