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Product Tutorials > Steering System Tutorial >

Uflex Hydraulic Steering System Guide




 

Appropriate hydraulic steering system selection
All the components of Ultraflex hydraulic steering systems are made specifically for the marine environment, using materials and working process which offer long life and safety for the most extreme conditions.
 

HOW THE SYSTEM WORKS
A manual hydraulic steering system consists of a helm which pumps hydraulic fluid through two hoses to a hydraulic cylinder which is mounted to an engine or rudder.
While steering, hydraulic oil is pushed through hoses into two chambers within the hydraulic cylinder. Depending upon which direction you steer, one of the two chambers is filled or relieved of oil, thereby changing the course of the boat.
While not actively steering, the torque (hydraulic pressure in the hoses) is held by a one way valve in the helm, which eliminates the transmission of the torque "feedback" to the steering wheel.
The number of turns from full lock-to-lock has a relationship to ease of steering. Generally speaking, the more number of turns lock-to-lock the easier the boat will be to steer and vice versa.
Because of the variety of applications and handling characteristics of boats, the number of turns lock to lock is often a matter of personal preference. As a general rule, the first priority should be ease of steering, then number of turns lock to lock. However, it is not recommended to have fewer than 4 turns lock to lock on high performance boats.
To calculate number of turns lock to lock simply divide the cubic inch displacement of the cylinder by the cubic inch displacement of the helm.
Other factors that can significantly affect the amount of effort to steer the system can be:
Fittings introduced between the helm and cylinder that restrict fluid efficiency
Oil viscosity
Type of hose and inside hose diameter.
Vessel speed
Trim angle
Rudder dimension, or engine power
Propeller selection
Hull type (displacement, planing, etc.)
Sea conditions 

 

 

Hydraulic cross reference guide - Cylinders

OUTBOARD CYLINDERS 

 UFLEX
 PART No.
 TELEFLEX®
 CROSS REFERENCE
 DESCRIPTION 
 UC128OBF 1  HC5345 or HC5358  CYLINDER, 1.38" BORE, 7.8" STROKE, FRONT MOUNT - # 1 LINK ARM
 UC128OBF 2  HC5345 or HC5358  CYLINDER, 1.38" BORE, 7.8" STROKE, FRONT MOUNT - # 2 LINK ARM
 UC128OBF 3  HC5345 or HC5358  CYLINDER, 1.38" BORE, 7.8" STROKE, FRONT MOUNT - # 3 LINK ARM
 UC128POBF 1  HC5345 or HC5358  CYLINDER, 1.38" BORE, 7.8" STROKE, FRONT MOUNT - PORT ENGINE CYLINDER
 - # 1 LINK ARM
 UC128POBF 2  HC5345 or HC5358  CYLINDER, 1.38" BORE, 7.8" STROKE, FRONT MOUNT - PORT ENGINE CYLINDER
 - # 2 LINK ARM
 UC128POBF 3  HC5345 or HC5358  CYLINDER, 1.38" BORE, 7.8" STROKE, FRONT MOUNT - PORT ENGINE CYLINDER
 - # 3 LINK ARM
 UC128-SVS 1  HC5345 or HC5358
 or HC6750
 or HC6751
 or HC6752
 HIGH PERFORMANCE CYLINDER, 1.38" BORE, 7.8" STROKE, FRONT MOUNT -
 # 1 LINK ARM
 UC128-SVS 2  HC5345 or HC5358
 or HC6750
 or HC6751
 or HC6752
 HIGH PERFORMANCE CYLINDER, 1.38" BORE, 7.8" STROKE, FRONT MOUNT -
 # 2 LINK ARM
 UC128P-SVS 1  HC5345 or HC5358
 or HC67502
 or HC6751
 or HC675
 HIGH PERFORMANCE CYLINDER, 1.38" BORE, 7.8" STROKE,
 FRONT MOUNT-PORT ENGINE CYLINDER- # 1 LINK ARM
 UC128P-SVS 2  HC5345 or HC5358
 or HC6750
 or HC6751 
 or HC6752
 HIGH PERFORMANCE CYLINDER, 1.38" BORE, 7.8" STROKE,
 FRONT MOUNT-PORT ENGINE CYLINDER- # 2 LINK ARM
 UC94OBF 1  HC4645H or
 C4647H or 
 HC4658H
 CYLINDER, 1.18" BORE, 7.3" STROKE, FRONT MOUNT
 (150 HORSEPOWER AND UNDER) - # 1 LINK ARM
 UC94OBF 3  HC4645H  CYLINDER, 1.18" BORE, 7.3" STROKE, FRONT MOUNT
 (150 HORSEPOWER AND UNDER) - # 3 LINK ARM
INBOARD CYLINDERS 
 UFLEX
 PART No.
 TELEFLEX®
 CROSS REFERENCE
 DESCRIPTION 
 UC116-I  HC5312  ALUMINUM CYLINDER, 1.25" BORE, 7" STROKE, BALL JOINT
 UC168-I  HC5314 or HC5318  ALUMINUM CYLINDER, 1.57" BORE, 7" STROKE, BALL JOINT
 UC215-I  HC5313  ALUMINUM CYLINDER, 1.57" BORE, 9" STROKE, BALL JOINT
 UC293-I  HC5314  BRASS CYLINDER, 2.0" BORE, 7" STROKE, BALL JOINT
 UC378-I  HC5378 or HC5379  BRASS CYLINDER, 2.0" BORE, 9" STROKE, BALL JOINT
 I-B648  HC5378 or HC5379  CYLINDER, 2.36" BORE, 11" STROKE, BALL JOINT
SIDEMOUNT OUTBOARD CYLINDER 
 UFLEX
 PART No.
 TELEFLEX®
 CROSS REFERENCE
 DESCRIPTION 
 UC132-OBS  HC5370  CYLINDER, 1.26" BORE, 8.0" STROKE, SIDE MOUNT
STERNDRIVE APPLICATION CYLINDERS 
 UFLEX
 PART No.
 TELEFLEX®
 CROSS REFERENCE
 DESCRIPTION 
 UC133-IOB  HC5330 or HC5332  CYLINDER, 1.26" BORE, 8" STROKE, BALANCED
 UC132-OBS  HC5328  CYLINDER, 1.26" BORE, 8" STROKE, UNBALANCED
HYDRAULIC PARTS AND ACCESSORIES 
 UFLEX
 PART No.
 TELEFLEX®
 CROSS REFERENCE
 DESCRIPTION 
 BBUSTER  POWER PURGE®  PURGING SYSTEM FOR UFLEX HYDRAULIC STEERING SYSTEMS
 KIT F  HA5450  REMOTE FILL KIT OF UP TILT HELMS AND UP REAR MOUNT HELMS
 OIL 15  HA5430  UFLEX HYDRAULIC OIL, 1 QUART
 X64  HA5417 or HA5418  SQUARE BEZEL FOR HYDRAULIC HELMS
 X57  HA5417 or HA5419  ROUND BEZEL FOR HYDRAULIC HELMS
 KIT OB-LL  HO51LL  PREMADE HYDRAULIC HOSES
 KIT OB BHBR-LL  HO81LL  PREMADE HYDRAULIC HOSES WITH BULKHEAD BEND RESTRICTORS
 KITOB SVS-LL  HO81LL  TWO FLEXIBLE HOSES SILVER STEER HIGH PERFORMANCE
 TU95-LL  HT5LL  NYLON TUBE IN 1 FT. INCREMENTS (NOT RECOMMENDED FOR OUTBOARD
 APPLICATIONS)
 KIT 95 2S  HF5501  ADDITIONAL STATION FITTING KIT FOR 3/8" NYLON OR COPPER TUBE
Hydraulic cross reference guide - Packaged systems and Helms

PACKAGED SYSTEMS 

 UFLEX
 MODEL
 NUMBER
 TELEFLEX®
 CROSS REFERENCE
 DESCRIPTION 
 HYCO 1.0  HK4200a - BayStar®  FRONT MOUNT OUTBOARD SYSTEM FOR 150 HP AND LESS
 PROTECH 1.0  HK6300 or HK6400 SeaStar®  FRONT MOUNT OUTBOARD SYSTEM
 PROTECH 2.0  HK6300 or HK6400 SeaStar®  FRONT MOUNT OUTBOARD SYSTEM
 PROTECH 3.0  HK6300 or HK6400 SeaStar®  FRONT MOUNT OUTBOARD SYSTEM
 PROTECH 1T  HK6400TC or HK6400TS
 or HK6500YTC SeaStar®
 FRONT MOUNT OUTBOARD SYSTEM WITH TILT HELM
 PROTECH 2T  HK6400TC or HK6400TS
 or HK6500YTC SeaStar®
 FRONT MOUNT OUTBOARD SYSTEM WITH TILT HELM PACKAGE
 PROTECH 3T  HK6400TC or HK6400TS
 or HK6500YTC SeaStar®
 FRONT MOUNT OUTBOARD SYSTEM WITH TILT HELM

HELMS
 UFLEX
 MODEL
 NUMBER
 TELEFLEX®
 CROSS REFERENCE
 DESCRIPTION 
 UP20FM  HH5270  FRONT MOUNT HELM, 1.2 CU.IN. 3/4" ANODIZED ALUM. TAPERED SHAFT
 UP25FM  HH5271  FRONT MOUNT HELM, 1.5 CU.IN. 3/4" TAPERED STAINLESS STEEL SHAFT
 UP28FM  HH5271  FRONT MOUNT HELM, 1.7 CU.IN. 3/4" TAPERED STAINLESS STEEL SHAFT
 UP33FM  HH5273  FRONT MOUNT HELM, 2.0 CU.IN. 3/4" TAPERED STAINLESS STEEL SHAFT
 UP39FM  HH5272  FRONT MOUNT HELM, 2.4 CU.IN. 3/4" TAPERED STAINLESS STEEL SHAFT
 UP20T  HH5291 or HH5740
 or HH4315
 TILT HELM, 1.2 CU.IN. 3/4" TAPERED SS SHAFT (X52 TILT INCLUDED & KIT F
 OPTIONAL)
 UP25T  HH5291 or HH5741
 or HH6191 or HH6491
 or HH6541
 TILT HELM, 1.5 CU.IN. 3/4" TAPERED SS SHAFT (X52 TILT INCLUDED & KIT F
 OPTIONAL) 
 UP28T  HH5291 or HH5741
 or HH6191 or HH6491
 or HH6541
 TILT HELM, 1.7 CU.IN. 3/4" TAPERED SS SHAFT (X52 TILT INCLUDED & KIT F
 OPTIONAL)
 UP33T  HH5290 or HH5774
 or HH6145 or HH6490
 TILT HELM, 2.0 CU.IN. 3/4" TAPERED SS SHAFT (X52 TILT INCLUDED & KIT F
 OPTIONAL)
 UP39T  HH5292 or HH5742
 or HH6192 or HH6492
 or HH6542
 TILT HELM, 2.4 CU.IN. 3/4" TAPERED SS SHAFT (X52 TILT INCLUDED & KIT F
 OPTIONAL)
 UP28R  HH5261  BACK MOUNT 1.7 CU.IN. 3/4" TAPERED SS SHAFT *(KIT F OPTIONAL)
 UP33R  HH5262  BACK MOUNT 2.0 CU.IN. 3/4" TAPERED SS SHAFT *(KIT F OPTIONAL)
 UP39R  HH5263  BACK MOUNT 2.4 CU.IN. 3/4" TAPERED SS SHAFT *(KIT F OPTIONAL)
 UP56R  HH5263  BACK MOUNT 3.4 CU.IN. 3/4" TAPERED SS SHAFT
 UP28F-SVS  HH5770  1500 PSI-HIGH PERFORMANCE FRONT MOUNT HELM, 1.7 CU.IN. 3/4" TAPERED
 SS SHAFT
 UP33F-SVS  HH5770  1500 PSI-HIGH PERFORMANCE FRONT MOUNT HELM, 2.0 CU.IN. 3/4" TAPERED
 SS SHAFT
 UP39F-SVS  HH5770  1500 PSI-HIGH PERFORMANCE FRONT MOUNT HELM, 2.4 CU.IN. 3/4" TAPERED
 SS SHAFT
 UP28T-SVS  HH5290 or HH5774
 or HH6189
 1500 PSI-HIGH PERFORMANCE TILT HELM, 1.7 CU.IN. TAPERED SS *(X52 TILT &
 KIT F OPTIONAL)
 UP33T-SVS  HH5290 or HH5774
 or HH6190
 1500 PSI-HIGH PERFORMANCE TILT HELM, 2.0 CU.IN. TAPERED SS *(X52 TILT &
 KIT F OPTIONAL)
 UP39T-SVS  HH5290 or HH5774
 or HH6188
 1500 PSI-HIGH PERFORMANCE TILT HELM, 2.0 CU.IN. TAPERED SS *(X52 TILT &
 KIT F OPTIONAL)





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