OTC 4277 User manual

4277
50GPMHydraulicFlowMeter
UserManual

English
1
Introduction
The OTC 4277 50 gpm Hydraulic Flow Meter provides the ideal solution for servicing and
commissioning hydraulic circuits on agricultural and other mobile machinery.
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and a pressure gauge all built into a strong steel case with a removable lid. The unit is self-
contained and requires no electrical power. The dials are clear and easy to read.
Installation is extremely simple and the test kit can be connected into either the pressure or
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system pressure.
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Reversible Flow Indicator
Removable Lid
Thermometer Loading Valve Knob
Inlet Connection
Outlet Connection
Pressure Gauge
Safety Precautions
CAUTION!;VWYL]LU[PUQ\Y`HUKVYWYVWLY[`KHTHNL
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and safety precautions must be read and discussed in the operator’s native language.
ONo alteration shall be made to this product.
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HS[LYLKVYPUWVVYJVUKP[PVU
OEnsure load valve is fully open prior to testing.
OWear eye protection that meets the standards of ANSI Z87.1 and OSHA.
Overview
The assembly comprises of the following items built into a steel frame.
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20 - 110 °C (65 - 230 °F)
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turn and gives progressive control of system pressure loading.
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English
2
Connections
)`ÅL_PISLOVZLM[YLJVTTLUKLKSLUN[O
Inlet Connection: 1-5/16”-12UN #16 SAE ORB
Outlet Connection: 1-1/16”-12UN #12 SAE ORB
Dimensions/Weight:
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(__TTRN
Adaptors
(KHW[VYZHYLÄ[[LKHZZ[HUKHYK[VWYV]PKLPUSL[
& outlet connections.
:WLJPÄJH[PVU
Measurement and Indication
Flow
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[V TPUPTPZL [OL LɈLJ[Z VM JOHUNLZ PU [LTWLYH[\YL HUK ]PZJVZP[` ;OL WPZ[VU TV]LTLU[ PZ
WYVWVY[PVUHS[V[OLJOHUNLPUÅV^YH[L0UYL]LYZL[OLWPZ[VUTV]LZIHJR[VHSSV^[OLÅV^[V
return at low pressure.
Accuracy:VMM\SSÅV^V]LYYHUNLJ:[
Pressure Drop
([M\SSÅV^^P[OVPS]PZJVZP[`JLU[PZ[VRLZ
Model Pressure Drop at Max. Flow
4277 218 psi
Pressure
.S`JLYPULÄSSLK” (63 mm) pressure gauge 0 - 6000 psi (0 - 420 bar) gives a continuous
reading of system pressure.
Accuracy: ± 1.6% of full scale
Temperature
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Accuracy: ± 5°F (± 2.5°C )
Model No. Flow Range Max. Working Pressure Temperature Range
4277 2.0 - 54 US gpm 6000 psi 65 - 230 °F
(10 - 200 lpm) (420 bar) (20 - 110 °C)
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Connect the unit into the hydraulic system as required using two 3 - 6 ft (1 - 2 metre) long
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I\[[OPZÅV^^PSSUV[ILTLHZ\YLK

English
3
10
20
30
40
50
60
70
80
50
75
100
125
150
175
°F °C
10
20
30
40
50
60
70
80
50
75
100
125
150
175
°F °C
Cylinder
Cylinder
Tank
OTC 4277
OTC 4277
Tank
Pump
Pump
Directional Valve
Test Hose
Relief Valve
Relief
Valve
Pump Test
Overall System Test
Typical Tests
Instructions for using the Hydraulic Flow Meter
1. Open loading valve by rotating counter-clockwise.
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pump at maximum speed. Do not change pump speed while turning the loading valve.
3. Slowly close the loading valve to develop the desired pressure. Run the machine until
normal operating temperature is reached i.e. typically 115 - 140°F (45 - 60°C).
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 *SVZLSVHKPUN]HS]LZSV^S`[VPUJYLHZLWYLZZ\YL5V[LYLK\J[PVUVMÅV^HZ[OLWYLZZ\YLPZ
increased to maximum pump pressure to determine pump condition.

English
4
1. Remove burst disc cartridge with a 1-3/8”AF spanner.
2. Remove the internal disc holder in the cartridge with 1-1/16”AF spanner.
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4. Tighten disc holder to 40 lb. ft. (55 Nm).
5. Check the seals.
6. Replace the entire cartridge assembly in the valve body.
NS
Normal Flow
Direction
SN
Pressure Control Valve Burst Disc
Cartridge
2 Burst Discs
(Max. 6000 psi / 420 bar)
Spacer
Reverse
Flow
Direction
Maintenance and service
Normal Flow
Direction
Reverse
Flow
Direction
1) 1-3/8”AF
2) 1-1/16”AF
3)
4) 40 lb. ft. (55 Nm).
5)
6) 1-3/8”AF
1
2;4
3
5
1;6
Replacement of burst discs (No. 573736)
Calibration
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or stored in environments where the equipment is exposed to dust or vibrations.
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