Jastram Model H Helm Pumps - 2 Pages

G* = Length of key for steering wheel:
H20 has 3/16" x 1" long sq. key on a 3/4" dia.
Taper (1" per foot) shaft.
H20 has a 5/16" NC wheel bolt.
All other pumps have 1/4" sq. key on a 1" dia.
Straight shaft.
All other pumps have a 1/2" NC stainless
steel wheel bolt.
HELM PUMP OVERALL DIMENSIONS (INCHES)
Helm Pump
Model
Helm Pump
Displacement (IN³)
A
B
C Dia.
H20
H26/ 36/ 58
H60/ 90/ 110
2.0
2.0 / 2.6 / 3.6 / 5.8
6.0 / 9.0 / 11.0
5 5/8"
5 5/8"
7 1/2"
4 3/8"
4 3/8"
5 7/8"
9/32"
9/32"
13/32"
Helm Pump Model
H20
H26
H36
H58*
H60
H90
H110
Part Number
G
H1
H2
8 5/8"
1 17/32" 2 13/32"
9 17/64" 2 5/32" 2 27/64"
15 27/64" 4 1/4" 3 27/32"
D
E
3/16" sq key x 1" LG
1/4" sq key x 1 1/2" LG
1/4" sq key x 1 25/32" LG
1/4" NPT
1/4" NPT
1/2" NPT
3/8" NPT
-
3/8" NPT
-
3/4" UNF
Cubic Inch
Displacement Per
Revolution
Weight
(LBS)
Weight
(Kg)
11.9
11.9
11.9
12.8
41.9
41.9
41.9
5.4
5.4
5.4
5.8
19.0
19.0
19.0
JA-301001-3
JA-301001-1
JA-301001-2
JA-301007-1
JA-301002-1
JA-301002-3
JA-301002-2
F
2.0
2.6
3.6
5.8
6.0
9.0
11.0
H3
*The H58, which requires a header tank or auto-ll system
Recommended line sizes and lengths are based on the combined distance of both lines
Helm Pump
Model
H20/H26/H36
H58
H60/H90
H110
50FT
1/2"
5/8"
5/8"
3/4"
Distance between Helm & Cylinder
65FT
5/8"
5/8"
5/8"
3/4"
95FT
5/8"
3/4"
3/4"
1"
Min Wall Thickness
Tube Dia.
Wall
1/2"
5/8"
3/4"
1"
0.035"
0.049"
0.049"
0.065"
Standard ISO Grade 32 Hydraulic oil must be used within a Jastram hydraulic steering system.
WARNING: DO NOT USE TRANSMISSION OIL OR BRAKE FLUID
Jastram Helm pumps are serviceable, seal kit part numbers are:
• JA-950000-1; covers Model H helms H20, H26, H36 and H58
• JA-950001-1; covers Model H helms H60, H90 and H110
Data is subject to change without notice.
Jastram Engineering Ltd. 135 West Riverside Drive | North Vancouver BC | Canada V7H 1T6 | T 604 988 1111 | F 604 986 0334
E marketing@jastram.com | www.Jastram.com

Jastram Model H Helm Pumps
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    Photo Courtesy of Victoria ShipyardJastram Model H Helm PumpsThis high quality, precision axial piston pump features proven designsand marine grade materials.The...
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