Summit TX25H User manual

OPERATOR
MANUAL
TX25H
TM
www.summittractors.com

CONTENTS
H 1.0
H 2.0
H 3.0
H 4.0
H 5.0
H 6.0
H 7.0
REF. NO
INTRODUCTION
SPECIFICATIONS
DETAILED VIEW OF HYDRAULIC SYSTEM
HYDRAULIC CIRCUIT DIAGRAMS
OPERATION
DISMANTLING PROCEDURE FOR HYDRAULIC LIFT
RE ASSEMBLY OF HYDRAULIC LIFT
DESCRIPTION
PAGE
H-1
H-1
H-3
H-7
H-11
H-14
H-23
I T L S E R V I C E M A N U A L
H
H 8.0
TROUBLESHOOTING OF HYDRAULIC SYSTEM
H-27

I T L S E R V I C E M A N U A L
H-1
H 1.0 INTRODUCTION
H 2.0 SPECIFICATIONS
Ÿ Fluid can be routed around any corner with fewer problems in comparison to mechanical linkage system.
Ÿ Power can be engaged with ease using control valve.
A system where fluid is used as media to transfer power is called Hydraulic System.
The reason for using hydraulic system for power transfer over mechanical system is due to following merits:
Hydraulic system is constant volume hydraulic system in model SUMMIT TX25. The discharge oil from hydraulic
pump is always constant and continuous. The pressure of system is changed by changing the hindrance, which is
created in the system with the help of different values.
Ÿ Because of self lubrication wear & tear is less and system is very economical to operate.
ŸIn tractors depending upon the drive to hydraulic pump and its location system can be live as well as non-live.
When pump is getting drive from transmission the system is called non-live. “LIVE” hydraulic system is there in
model SUMMIT TX25.
Technical Features:
ŸPossibility to regulate the lowering speed of implement
Ÿ Determined by position lever
Ÿ Oil filter not built-in
Ÿ Required degree of filtering: 20÷25µm
ŸThree point linkage fixed
Ÿ Functions with oil of transmission
ŸFunctioning at controlled position
Ÿ Manual hydraulic stop against accidental lowering of
Ÿ Implement during road transport
Ÿ Limit stop of lifting arms in position of maximum height
Ÿ Oil temperature: 176 °F ( 80°C)
Ÿ Sector control with lever
HYDRAULIC SYSTEM
PARAMETER DETAILS
Oil Capacity 25 Liters/ 6.60 US gallon
ISO VG 32/ISO VG56
Gear type
3.51 gallon per minute
One magnetic suction strainer in suction line and two
replaceable filter suction and delivery line
Response control knob in closed position as transport lock
a) Position control lever
b) Response control knob
After every 1000 hours of operation
1322.77 pound(600Kg)
Oil grade
Hydraulic Pump
Flow at rated engine speed
Filters
Type of linkage lock for transport
Control levers
Oil change period
Maximum lifting capacity

I T L S E R V I C E M A N U A L
H-2
HYDRAULIC SYSTEM
ŸWorking stroke : 3.62 in (92mm)
ŸExcursion of control lever : 42°
ŸThe position relief valve is external of the rockshaft
Dimensional Features
Ÿ Piston displacement: 305 cm³
ŸCalibration of relief valve : 2465.64 PSI(170 ±5bar)
Ÿ Angular excursion of lifting arms in internal mechanical limit stops: 78°
Ÿ Calibration of cylinder safety valve : 2973.274 PSI(205 ±5bar)
Ÿ Angular excursion of lifting arms in controlled position : 75°
ŸPiston diameter : 2.56 in (65mm)

I T L S E R V I C E M A N U A L
H-3
H 3.0 DETAILED VIEW OF HYDRAULIC SYSTEM
HYDRAULIC SYSTEM
1 Lift Body Assembly
3 Lock Washer D=8 Din 7980
6 Encl. in Seal Kit
4 Screw M8x35 8g Din 931
Tab. 2 - Pos. 3 -7- 8 -10-11
7 Screw M10x35 Uni5737
2 Kit Relief Valve
Tab. 4 - Pos. 4
8 Kit Flange with O-ring
9 Washer D=10/20x2,6 Zn
Tab. 1 - Pos. 5 - 6
10 Seal Kit:
5 Encl. in Seal Kit

I T L S E R V I C E M A N U A L
H-4
HYDRAULIC SYSTEM
3 Kit Position Lever
2 Kit Camshaft
4 Encl. in Seal Kit
1 Kit Quadrant With Friction

I T L S E R V I C E M A N U A L
H-5
HYDRAULIC SYSTEM
5 Kit Crank
1 Arm
2 Seeger E34 Din 471
3 Encl. in Seal Kit
4 Shaft
6 Kit Cylinder
7 Encl. in Seal Kit
8 Encl. in Seal Kit
9 Kit Piston
11 Encl. in Seal Kit
10 Encl. in Seal Kit

I T L S E R V I C E M A N U A L
H-6
HYDRAULIC SYSTEM
2 Kit Compensator
1 Kit Lever
3 Kit Pin
4 Lever
5 Kit Pin

I T L S E R V I C E M A N U A L
H-7
H 4.0 DISMANTLING PROCEDURE FOR HYDRAULIC LIFT
HYDRAULIC SYSTEM
Step - 2: Removal of Control Valve Assembly
ŸUnscrew hex bolts of control valve body and remove
the control valve assembly.
ŸUnscrew banjo bolt of hydraulic cylinder.
Step - 3: Removal of Hydraulic Cylinder
ŸFirst of all, remove lift body assembly from
transmission housing by removal of hex bolts (9 nos).
Step - 1: R e m o v a l of Hy d r a u l i c Lift f r o m
Transmission Housing

I T L S E R V I C E M A N U A L
H-8
HYDRAULIC SYSTEM
ŸUnscrew allen screw from lift body for removal of
hydraulic cylinder.
ŸRemove hydraulic cylinder from lift body.
Step - 4: Removal of Rock Shaft
ŸUnlock circlip from both ends of Rock Shaft as shown
in figure.

I T L S E R V I C E M A N U A L
H-9
HYDRAULIC SYSTEM
ŸRemove screw plug from ram arm for removal of
Rock Shaft as shown in figure.
ŸRemove the Rock Shaft by using hammer as shown
in figure.
ŸRemove lift arms by using hammer as shown in
figure.

I T L S E R V I C E M A N U A L
H-10
HYDRAULIC SYSTEM
ŸRemove lock pin (1) as shown in figure.
Step - 5: Removal of Lever Assembly
ŸRemove lock pin (2) as shown in figure.
ŸRemove the push rod as shown in figure.

I T L S E R V I C E M A N U A L
H-11
HYDRAULIC SYSTEM
H 5.0 HYDRAULIC CIRCUIT DIAGRAM OF MODEL SUMMIT TX25H WITH SINGLE ACTING DCV
CIRCUIT WITH PRIORITY VALVE UPTO 10.56 GPM
Steering Unit to
Steering Cylinder
Steering Unit
40 CC Return Pipe
St. Unit to Tank
Tank
Delivery
Port
Suction
Port
Hydraulic Pump
5.5 CC
Hose Pipe
Delivery Pipe
Pump to P-valve
Delivery Pipe
P-valve to DCV
Priority
Valve
Load Sensing
Semi Flexible Pipe
Semi Flexible Pipe
P-Valve to St. Unit
Hydraulic Lift
Delivery Pipe
DCV to Lift
DCV
Strainer Suction Pipe
With Flange
Delivery Pipe
P-Valve (CF)
to QRC
Return Pipe
DCV to Tank

I T L S E R V I C E M A N U A L
H-12
H 5.1 HYDRAULIC CIRCUIT DIAGRAM OF MODEL SUMMIT TX25H WITH DOUBLE ACTING DCV
CIRCUIT WITH PRIORITY VALVE UPTO 10.56 GPM
HYDRAULIC SYSTEM
Steering Unit to
Steering Cylinder
Steering Unit
40 CC Return Pipe
St. Unit to Tank
Tank
Delivery Pipe
P-Valve (CF)
to QRC-2
Hydraulic Lift
Load Sensing
Semi Flexible Pipe
Semi Flexible Pipe
P-Valve to St. Unit
Delivery Pipe
Pump to P-valve
Hydraulic Pump
5.5 CC
Delivery
Port
Suction
Port Hose Pipe
DCV
Delivery Pipe
P-valve to DCV
Delivery Pipe
DCV to Lift
Strainer Suction Pipe
With Flange
Delivery Pipe
P-Valve (CF)
to QRC
Priority
Valve

I T L S E R V I C E M A N U A L
H-13
H 5.2 CIRCUIT DIAGRAM OF HYDRAULIC LIFTING DEVICE
HYDRAULIC SYSTEM
Rockshaft
Sollevatore
Cover End
Cylinder
Rockshaft

I T L S E R V I C E M A N U A L
H-14
HYDRAULIC SYSTEM
H 6.0 OPERATION OF POWER LIFT CONTROL VALVE ON- OFF
In this phase the control valve keeps pressure on the oil contained in the cylinder thus allowing the oil coming from the
pump to flow freely to the tank.
The oil contained in the cylinder (Chamber 9) is kept under pressure by the check valve “3”, by the discharge valve “4”
and by the safety valve “10” connected to the cylinder “9” by the annular duct “11” thus holding the load applied to the
lifting arms.
Neutral Phase
The safety valve “10” secures protection from any possible over pressure during the implement movement.
The oil coming from the pump enter the annular duct “8” will thus be able to move the differential valve “2” downward
and thus opens the discharge hole “7” and the oil will flow to the tank.
In this phase the control spool “1” is in such a position to connect the chamber “5” of the differential valve “2” directly to
the discharge through hole “6”.
The control valve is pre-set to obtain three distinct phases:
Neutral Phase
Delivery Phase
Discharge Phase

I T L S E R V I C E M A N U A L
H-15
HYDRAULIC SYSTEM
The lifting speed depends on the pump rpm.
The external relief valve is directly connected to the inlet port of oil coming from the pump.
The Control spool “1” is in such a position to connect the chamber “5” of the differential valve “2” with oil coming from
the pump through annular duct “8” and holes “12” and “13” making in this way the valve itself to close.
During this phase the Control Valve supplies the oil under pressure to the cylinder “9” and it consequently lifts the
arms.
The oil from the pump finding the differential valve “2” closed goes to cylinder, pass the hole “14” opens the check
valve “3” enters in the annular duct “11” and enters the chamber “9”.
Delivery Phase
In this phase the maximum lifting pressure is controlled by the safety valve “15” that is connected to the annular duct
“8” through hole “14” and then to the oil inlet.

I T L S E R V I C E M A N U A L
H-16
HYDRAULIC SYSTEM
At the same time the pressure oil contained in the cylinder (chamber “9”) flows to the tank therefore causing the
lowering of arms.
By screwing the lever the lowering speed is reduced, by screwing totally the valve “16” is closed on the seat and
therefore the arms are locked for transport safety.
The oil coming from the pump enters in the annular duct “8” is able to move the differential valve “2” downward and
open the discharge hole “7” and enables the oil go to the tank.
During this phase the control valve supplies at the same time the oil coming from the pump and the oil contained in the
cylinder to the discharge causing the lowering of the arms.
In this phase the lowering speed of the implement can be adjusted with the lever AP.
The control spool “1” is in such a position to connect chamber “5” of differential valve directly to the discharge through
hole “6”.
Discharge Phase
From chamber “9” the oil goes into the annular duct “11” passing the lowering speed regulation valve “16” through the
connecting hole “17” enter into the discharge valve “4” that is kept open from the spool “1” and goes to discharge from
hole “18”.

I T L S E R V I C E M A N U A L
H-17
Operation 1: Assembly the plugs and washers on Auxiliary valve
HYDRAULIC SYSTEM
Metallic Plug
Copper Washer
Copper Washer
Torque 3-3.5 Kgm
Copper Washer
Domed Cap Nut
Nut
Ÿ Take Out Domed Cap Nut
ŸCopper Washers and Nut
Ÿ Assemble the Auxiliary Valve on the Rockshaft
Operation 2:

I T L S E R V I C E M A N U A L
H-18
HYDRAULIC SYSTEM
ŸChecking the pressure on the gauge and setting the pressure with setscrew wrench.
ŸStarting the tractor.
ŸMove the action lever on the auxiliary valve.
ŸGauge to be used on pressure line from pump to inlet rockshaft turn the screw in clockwise direction for the
increase of the pressure and turn in anti clockwise direction for the decrease of the pressure setting the relief valve
at 170-175 bar (16-20 L/min).
Torque 3-3.5 Kgm
Turn Screw
Set Screw Wrench
Operation 3:
GAUGE ON THE LINE PRESSURE
PUMP - INLET ROCKSHAFT
HEXAGONAL WRENCH
GAUGE
ACTION LEVER