Landoll 7431 User Manual

Model 7431

VT Plus

Operator’ s Manual

LANDOLL CORPORATION

1900 North Street

Marysville, Kansas 66508

[phone]

800-428-5655 ~ WWW.LANDOLL.COM

F-561-0113 01/2013

1 Introduction

Understanding Safety Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

2 Standard Specifications
3 Assembly Instructions

7431 VT Plus Frame and Hitch Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Leveler Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Manual Leveler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Hydraulic Leveler (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Center Frame Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Disc Gangs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Wing Frames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Table of Contents

Hydraulic Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Light and SMV Bracket Installation (Prior to August, 2013) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

LED Light and SMV Bracket Installation (After August, 2013) . . . . . . . . . . . . . . . . . . . . . . . . . 3-29

Conditioner Reel Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

Finishing Hydraulic Conditioner Reel Installation (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38

Rear Tow Hitch Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-41

Rear Jack Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42

Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42

4 Operation and Maintenance

Tractor Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

VT Plus Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Attaching to the Tractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Hydraulic Lift System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Hydraulic Fold System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

General Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Field Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Leveling (Side to Side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Leveling (Front-to-Rear) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

F-561-0113 Edition i

Hydraulic Leveler Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Hitch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

Scraper Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

Front Gauge Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Disc Blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15

Depth Stop Adjustment (Manual) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Wheel Bearing Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

Hydraulic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18

Lubrication Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22

5 Troubleshooting Guide

ii F-561-0113 Edition

Chapter 1

Introduction

The Landoll Model 7431 VT Plus is a quality product designe d to give ye ars of trouble fr ee perfo rmance. By following
each section of this manual, your system will perform as designed for you and your operation

CHAPTER 1 gives basic instructions on the use of this manual.
CHAPTER 2 gives product specifications. These specifications supply lengths and measures for your

equipment. A S tandard Bolt Torque Table is provided to give guidelines for bolt to rques to
be used when servicing this product.

CHAPTER 3 contains assembly instructions for your Model 7431 VT Plus. When these procedures

are correctly followed, your equipment should provide you years of trouble-free operation
and service.

CHAPTER 4 instructs how to operate your equipment before using it, and describes adjustments

needed. It also gives practical advice for the care and maintenance of your Landoll
equipment. Drawings in this section locate adjustment points on the equipment.

NOTE: IF THE EQUIPMENT IS IMPROPERLY ASSEMBLED OR MAINTAINED, THE
WARRANTY IS VOID. IF YOU HAVE ANY QUESTIONS CONTACT:

LANDOLL CORPORATION

1900 NORTH STREET

MARYSVILLE, KANSAS 66508

or phone:

[phone] or

[phone]

or FAX:

[phone]

CHAPTER 5 is a troubleshooting guide to aid in diagnosing and solving problems with the equipment.
PARTS LIST is a separate manual showing the various assemblies, subassemblies, and systems.

Refer to that manual when ordering Landoll replacement parts. Order parts from your
Landoll dealer.

WARRANTY The Warranty Registration form is included with the product documents. Fill it out and

mail it within 15 days of purchase.

NOTE: IMPROPER ASSEMBLY, MODIFICATION, OR MAINTENANCE OF YOUR
LANDOLL MACHINE CAN VOID YOUR WARRANTY.

COMMENTS Address comments or questions regarding this publication to:

LANDOLL CORPORATION

1900 NORTH STREET

MARYSVILLE, KANSAS 66508

ATTENTION: PUBLICATIONS -DEPT. 55

1-1

INTRODUCTION



DANGER



WARNING



CAUTION

NOTE

NOTE

Understanding Safety Statements

You will find various types of safety information on the
following pages and on the machine signs (decals)
attached to the vehicle. This section explains their
meaning.

The Safety Alert Symbol means ATTENTION! YOUR
SAFETY IS INVOLVED!

Danger means a life-threatenin g sit ua ti on ex is ts.
Death can occur if safety measures or
instructions on this label are not properly
followed.

Warning means serious injury or death can occur
if safety measures or instructions on this label
are not properly followed.

Caution means serious equipment or other
property damage can occur if instruction s on this
label are not properly followed.

Means that failure to follow these instructions could
cause damage to the equipment or cause it to operate
improperly.

Make sure you read and understand the informatio n
contained in this manual and on the machine signs
(decals) before you attempt to operate or maintain this
vehicle.

The safety statements contai ned in this manual relate to
the operation of the Model 7431 VT Plus.

1-2 F-561-0113 Edition

Chapter 2

Standard Specifications

7431 VT Plus
Model No. 7431-20 7431-23 7431-26 7431-29 7431-33
Working Width
Tran sport Width
Tran sport Height
Blade Diameter
No. Of Blades
No. Of Bearings

Tire Size And Ply

Spindle Size
Wheel Bolt Pattern
Estimated Weight (w/

6 Ga. Blade Option) (Lbs.)

Specifications Are Subject To Change Without Prior Notification.

19’-10” 23’-2” 26’-3” 28’-11” 33’-2”
13’-7” 13’-7” 13’-7” 13’-7” 17’-11”
9’-10” 11’-6” 13’-7” 13’-1 1 ” 13’-11”
22” 22” 22” 22” 22”
34/36 38/40 44/46 48/50 56/58
8/8 10/10 10/10 12/12 14/14
12L X 15 Load

Range F

2-1/4” 2-1/4” 3” (Center

8 Bolt 8 Bolt 8 Bolt 8 Bolt 8 Bolt
15,780 17,736 20,050 21,954 24,322

12L X 15 Load
Range F

380/55R - 16.5
(Center Frame)
12L X 15
Load Range F
(Wings)

Frame)
2-1/4” (Wings)

380/55R - 16.5
(Center Frame)
12L X 15
Load Range F
(Wings)
3” (Center
Frame)
2-1/4” (Wings)

32/1550 x 16.5 Load
Range G (Galaxy) or
400/60-15.5
(Trelleborg)

3” (Center Frame)
2-1/4” (Wings)

Tire Inflation

Tire Size Tire Manufacturer Ply/Load Rating Inflation Pressure (Psi) (Max.)

12.5L x 15
Farm Highway Service
32/1550 x 16.5 Galaxy G Load 8000 lbs. @ 20 mph 100 psi
400/60-15.5 Trelleborg 6,380 lbs. @ 25 mph 51 psi
380/55R-16.5 Goodyear Load Index 150A8/B7400 lbs @ 30 mph 73 psi

20.5 x 8.0-10 Load Range D/ 1,320 lb. 70 psi

Goodyear F Load 6000 lbs. @ 20 mph 90 psi

2-1

STANDARD SPECIFICATIONS



WARNING

RECOMMENDED TORQUE SPECIFICATION FOR LUG BOLTS AND NUTS

BOLT SIZE TORQUE (FT. LBS.)

9/16-18 (Heavy Duty Disc) 80 - 90 ft. lbs
5/8-18 (Heavy Duty Disc) 85 - 100 ft. lbs

7431-33 VT Plus models have two wheel and tire
sizes available. Do not install a tire made for a
standard 15” rim diameter on a 15.5” rim
diameter. Mixing whee l and tire sizes can result in
serious damage to the machine or serious
personal injury.

2-2 F-561-0113 Edition

STANDARD SPECIFICATIONS

LANDOLL CORPORATION

GENERAL TORQUE SPECIFICATIONS (REV. 4/97)

THIS CHART PROVIDES TIGHTENING TORQUES FOR GENERAL PURPOSE APPLICATIONS WHEN SPECIAL TORQUES ARE NOT SPECIFIED ON PROCESS
OR DRAWING.
ASSEMBLY TORQUES APPLY TO PLATED NUTS AND CAPSCREWS ASSEMBLED WITHOUT SUPPLEMENTAL LUBRICATIO N (AS RECEIVED CONDITION).
THEY DO NOT APPLY IF SPECIAL GRAPHITE MOLY-DISULFIDE OR OTHER EXTREME PRESSURE LUBRICANTS ARE USED.
WHEN FASTENERS ARE DRY (SOLVENT CLEANED), ADD 33% TO AS RECEIVED CONDITION TORQUE.
BOLT HEAD IDENTIFICATION MARKS INDICATE GRADE AND MAY VAR Y FROM MANUFACTURER TO MANUFACTURER.
THICK NUTS MUST BE USED ON GRADE 8 CAPSCREWS.
USE VALUE IN [ ] IF USING PREVAILING TORQUE NUTS.

TORQUE IS SPECIFIED IN FOOT POUNDS

UNC

Size

SAE Grade2SAE Grade5SAE Grade

8

UNF
Size

SAE Grade 2SAE Grade5SAE Grade

8

1/4-20 4 [5] 6 [7] 9 [11] 1/4-28 5 [6] 7 [9] 10 [12]
5/16-18 8 [10] 13 [16] 18 [22] 5/16-24 9 [11] 14 [17] 20 [25]
3/8-16 15 [19] 23 [29] 35 [43] 3/8-24 17 [21] 25 [31] 35 [44]
7/16-14 24 [30] 35 [43] 55 [62] 7/16-20 27 [34] 40 [50] 60 [75]
1/2-13 35 [43] 55 [62] 80 [100] 1/2-20 40 [50] 65 [81] 90 [112]
9/16-12 55 [62] 80 [100] 1 1 0 [137] 9/16-18 60 [75] 90 [112] 130 [162]
5/8-11 75 [94] 110 [137] 170 [212] 5/8-18 85 [106] 130 [162] 180 [225]
3/4-10 130 [162] 200 [250] 280 [350] 3/4-16 150 [188] 220 [275] 320 [400]
7/8-9 125 [156] 320 [400] 460 [575] 7/8-14 140 [175] 360 [450] 500 [625]
1-8 190 [237] 408 [506] 680 [850] 1-14 210 [263] 540 [675] 7 60 [950]
1-1/8-7 270 [337] 600 [750] 960 [1200] 1-1/8-12 300 [375] 660 [825] 1080 [1350]
1-1/4-7 380 [475] 840 [1050] 1426 [1782] 1-1/4-12 420 [525] 920 [1150] 1500 [1875]
1-3/8-6 490 [612] 110 [1375] 1780 [2225] 1-3/8-12 560 [700] 1260 [1575] 2010 [2512]
1-1/2-6 650 [812] 1460 [1825] 2360 [2950] 1-1/2-12 730 [912] 1640 [2050] 2660 [3325]
1-3/4-5 736 [920] 1651 [2063] 2678 [3347] 1-3/4-12 920 [1150] 2063 [2579] 3347 [4183]

METRIC

COARSE THREAD METRIC CLASS 10.9 FASTENERS AND CLASS 10.0 NUTS AND THROUGH HARDENED FLAT WASHERS, PHOSPHATE COATED, ROCKWELL
“C” 38-45.
USE VALUE IN [ ] IF USING PREVAILING TORQUE NUTS.

Nominal

Thread

Diameter

mm

Standard Torque Nominal

Newton-

Meters

Foot-

Pounds

Thread

Diameter

mm

Standard Torque

Newton-

Meters

Foot-

Pounds

6 10 [14] 7 [10] 20 385 [450] 290 [335]
7 16 [22] 12 [16] 24 670 [775] 500 [625]
8 23 [32] 17 [24] 27 980 [1105] 730 [825]
10 46 [60] 34 [47] 30 1330 [1470] 990 [1090]
12 80 [101] 60 [75] 33 1790 [1950] 1340 [1450]
14 125 [155] 90 [115] 36 2325 [2515] 1730 [1870]
16 200 [240] 150 [180] 39 3010 [3210] 2240 [2380]
18 275 [330] 205 [245]

Table 2-1: General Torque Specifications

2-3

STANDARD SPECIFICATIONS

LANDOLL CORPORATION

HYDRAULIC FITTING TORQUE SPECIFICATIONS

THIS CHART PROVIDES TIGHTENING TORQUES FOR HYDRAULIC FITTING APPLICATIONS WHEN SPECIAL TORQUES ARE NOT SPECIFIED ON PROCESS
OR DRAWING.
ASSEMBLY TORQUES APPLY TO PLATED CARBON STEEL AND STAINLESS STEEL FITTINGS ASSEMBLED WITHOUT SUPPLEMENTAL LUBRICATION (AS

RECEIVED CONDITION). THEY DO NOT APPLY IF SPECIAL GRAPHITE MOLY-DISULFIDE OR OTHER EXTREME PRESSURE LUBRICANTS ARE USED.
BRASS FITTINGS AND ADAPTERS - 65% OF THE TORQUE VALUE FOR STEEL. STAINLESS STEEL, ALUMINUM AND MONEL - THREADS ARE TO BE

LUBRICATED

.

TORQUE IS SPECIFIED IN FOOT POUNDS

Dash Size 37 Degree JIC O-Ring (ORS) O-Ring Boss (ORB)

-4 11-13 15-17 13-15

-5 14-16 — 21-23

-6 20-22 34-36 25-29

-8 43-47 58-62 40-44

-10 55-65 100-110 57.5-62.5

-12 80-90 134-146 75-85

-16 115-125 202-218 109-121

-20 160-180 248-272 213-237

-24 185-215 303-327 238-262

-32 250-290 — 310-340

o

37

JIC, ORS, & ORB (REV. 10/97)

PARKER BRAND FITTINGS

GATES BRAND FITTINGS

Dash Size 37 Degree JIC O-Ring (ORS) O-Ring Boss (ORB)

-4 10-11 10-12 14-16

-5 13-15 — —

-6 17-19 18-20 24-26

-8 34-38 32-40 37-44

-10 50-56 46-56 50-60

-12 70-78 65-80 75-83

-14 — 65-80 —

-16 94-104 92-105 111-125

-20 124-138 125-140 133-152

-24 156-173 150-180 156-184

-32 219-243 — —

AEROQUIP BRAND FITTINGS

Dash Size 37 Degree JIC O-Ring (ORS) O-Ring Boss (ORB)

-4 11-12 10-12 14-16

-5 15-16 — 18-20

-6 18-20 18-20 24-26

-8 38-42 32-35 50-60

-10 57-62 46-50 72-80

-12 79-87 65-70 125-135

-14 — — 160-180

-16 108-113 92-100 200-220

-20 127-133 125-140 210-280

-24 158-167 150-165 270-360

-32 245-258 — —

Table 2-2: Hydraulic Fitting Torque Specifications

2-4 F-561-0113 Edition

STANDARD SPECIFICATIONS

9”

97-3/4”

26”

24-1/2”

114”

7431-20 top p1

26-3/4”

70”

Figure 2-1: Wing Stabilizer and Light Bracket Placement (20' Model)

(Left Half)

2-5

STANDARD SPECIFICATIONS

8”

133”

43”

7431-20 top p2

26”

114”

26-3/4”

70”

Figure 2-2: Wing Stabilizer and Light Bracket Placement (20' Model)

(Right Half)

2-6 F-561-0113 Edition

STANDARD SPECIFICATIONS

9”

97-3/4”

28”

24-1/2”

114”

7431-23 top p1

26-3/4”

91”

Figure 2-3: Wing Stabilizer and Light Bracket Placement (23' Model)

(Left Half)

2-7

STANDARD SPECIFICATIONS

8”

133”

43”

7431-23 top p2

28”

114”

26-3/4”

91”

Figure 2-4: Wing Stabilizer and Light Bracket Placement (23' Model)

(Right Half)

2-8 F-561-0113 Edition

STANDARD SPECIFICATIONS

7430-26 top p1

9”

97-3/4”

26-1/2”

30”

24-1/2”

114”

114”

Figure 2-5: Wing Stabilizer and Light Bracket Placement (26' Model)

(Left Half)

2-9

STANDARD SPECIFICATIONS

7431-26 top p2

8”

133”

43”

30”

114”

26-1/2”

114”

Figure 2-6: Wing Stabilizer and Light Bracket Placement (26' Model)

(Right Half)

2-10 F-561-0113 Edition

STANDARD SPECIFICATIONS

9”

97-3/4”

30”

24-1/2”

26-3/4”

7430-29 top p1

129”

114”

Figure 2-7: Wing Stabilizer and Light Bracket Placement (29' Model)

(Left Half)

2-11

STANDARD SPECIFICATIONS

8”

133”

30”

43”

7430-29 top p2

26-3/4”

129”

114”

Figure 2-8: Wing Stabilizer and Light Bracket Placement (29' Model)

(Right Half)

2-12 F-561-0113 Edition

STANDARD SPECIFICATIONS

7431-33 top p1

14-1/4”

96”

114”

18”

97”

24”

91”

Figure 2-9: Wing Stabilizer and Light Bracket Placement (33' Model)

(Left Half) (Prior to July, 2012)

2-13

STANDARD SPECIFICATIONS

7431-33 top p2

14-1/4”

132”

114”

18”

46”

97”

24”

Figure 2-10: Wing Stabilizer and Light Bracket Placement (33' Model)

(Right Half) (Prior to July, 2012)

2-14 F-561-0113 Edition

STANDARD SPECIFICATIONS

7431-33 top p1 after 07-2012

96”

27”

129”

33”

156”

14-1/4”

46”

Figure 2-11: Wing Stabilizer and Light Bracket Placement (33' Model)

(Left Half) (After July, 2012)

2-15

STANDARD SPECIFICATIONS

7431-33 top p2 after 07-2012

132”

27”

129”

33”

156”

14-1/4”

46”

22-1/2”

2-16 F-561-0113 Edition

Figure 2-12: Wing Stabilizer and Light Bracket Placement (33' Model)

(Right Half) (After July, 2012)

STANDARD SPECIFICATIONS

Page Intentionally Blank

2-17

STANDARD SPECIFICATIONS

2-18 F-561-0113 Edition

It is very important that your new 7431 VT Plus be



CAUTION



DANGER



WARNING



DANGER

properly assembled, adjusted and lubricated before use.
Illustrations to assist with the assembly process are
provided in Section 2, “Sta ndard Specifications”. They
show proper disc gang, wing stabilizer bracket, and light
mounting bracket spacing. Illustrations in this section
show proper assembly procedures. Remove paint from
grease fittings. Replace any grease fittings that are
damaged or missing. Be sure to return screws, clips, etc.,
to their original locations.

To insure alignment of assemblies, leave the nuts loose
until completion of final assembly. Use lock washers or
flat washers as specified. Spread all cotter pins.

After completion of final assembly, tighten all nuts
evenly to prevent misalignment, distortion or binding.

Tighten all screws and nut s to the recommende d torques

(See “General Torque Specifications” on page 2-3.).

Be sure to bleed the hydraulic system of all air in
lines after inst allation. Failure to bleed the syst em
of all air can result in improper machine
operation.

Chapter 3

Assembly Instructions

Disc blades are extremely sharp. Exercise
extreme care when working on or near disc
blades. Do not allow discs to roll over or fall on to
any bodily part. Do not allow wrenches to slip
when working near disc blades. Never push
wrenches toward disc blades. Do not climb over
machine above disc blades. Fail ure to stay clear
of disc blade edges can cause serious personal
injury or death.

Do not attempt to lift heavy parts (such as the
frame, disc gangs, rock shaft, and pull hitch)
manually. Use a hoist or a fork lift to move these
parts into position.

To prevent accidental lowering:

1. All hydraulically elevated equipment must be
locked out using the cylinder lockouts:

2. Lower equipment to the ground while
servicing or when it is idle.

Failure to take measures to prevent accidental
lowering may result in serious personal injury or
death.

3-1

ASSEMBLY INSTRUCTIONS

frame and hitch assy

WING NUT
HOSE HOLDER

CLAMP
3/8-16 HEX NUT

3/8-16 X 3-1/2

ALL THREAD

SCREW
HITCH

WELDMENT
3/4-16 X 5-1/2 HEX

HEAD CAP SCREW

1-8 X 8-1/2 HEX
HEAD CAP SCREW

HITCH RING
HITCH CLEVIS

3/4-10 PREVAILING
TORQUE FLANGE
NUT

1/4-20 X 1 HEX HEAD

CAP SCREW

HOSE HOLDER
BRACKET

1-8 X 7-1/2 HEX
HEAD CAP SCREW

3/4-16 HEX NUT
SAFETY CHAIN

ASSEMBLY

OR
3/8-16 X 4-1/2 W/ HYD
REELS

1-1/8-7 HEX
LOCK NUT

10 AND 14 GA
MACHINE BUSHINGS

HITCH MOUNT
PLATE

1-1/8 -7 X 7-1/2 HEX
HEAD CAP SCREW

1/2-13 HEX LOCK NUT

CENTER FRAME
ASSEMBLY

1/2-13 X 11 HEX
HEAD CAP SCREW

HOSE HOLDER
CLAMP

SEE DETAIL
A

3/4-10 X 7 HEX
HEAD CAP SCREW

JACK MOUNT TUBE
(JACK NOT SHOWN)

1-8 HEX LOCK
NUT

3/8-16 X 2-1/2 OR

3/8-16 X 3
HEX HEAD

CAP SCREW
3/8W FLAT

WASHER
HOSE CLAMP
3/8-16 HEX

LOCK NUT

OR

3/8-16 X 4-1/2

DET AIL A

3-2 F-561-0113 Edition

Figure 3-1: Frame and Hitch Assembly Installation

7431 VT Plus Frame and Hitch

IMPORT ANT



WARNING

NOTE

NOTE

Assembly

Read all safety precautions at the front of the section
before attempting any of the following procedures.

1. Place the center frame asse m bly on s tands
approximately 36” high. The assembly area should
be a large level area of sufficient size to
accommodate the disc when fully assembled.

Do not attempt to lift heavy parts (such as the
frame, disc gangs, rock shaft, and pull hitch)
manually. Use a hoist or a fork lift to move these
parts into position.

2. Attach the hitch weldment to the front of the center
frame using 1-1/8-7 x 7-1/2 hex head cap screws,
machine bushings, hitch mounting plates, and hex
lock nuts (See Figure 3-1.) Machine bushings are
provided to remove the slack on each side of the ball
joints and center the hitch. Use bushings as required.

ASSEMBLY INSTRUCTIONS

The hitch may be assembled in the upper or lower
position depending on matching tractor drawbar height.
See “Hitch Adjustment” on page 4-12 for proper
adjustment.

3. Move the tongue jack to the forward mounting tube
and rotate to parking position to support the front of
the hitch.

4. Insert a 3/4-10 x 7 hex head cap screw into the hose
holder tube on the right side of the hitch from the
bottom side so the threads point upward. Hold in
place with a 3/4 prevailing torque flange nut with the
flange pointing upward as well. Do not tighten this
cap screw, so the hose holder br acket may pivot
freely in this joint.

5. Slide the hose holder bracket over the screw and
secure with another 3/4 prevailing torque flange nut.

6. Install a 3/8-16 x 3-1/2 all-thread screw in the front of
the hose holder bracket and secure with a 3/8-16 hex
nut. Use 3/8-16 x 4-1/2 all-thread screw if installing
hydraulic reels.

7. Slide the hose holder clamp over the 3/8” screw and
loosely start the wing nut on top of the clamp.
Hydraulic hoses will be routed through the clamp
after assembly.

8. Install hose holder clamp at rear of hitch with 1/2-13 x
11 hex head cap screws and hex lock nuts.

The clamp has two sides, so that extend hoses can be
located on one side and retract hoses can be located on
the other side for reference.

3-3

ASSEMBLY INSTRUCTIONS

7431 leveler assembly

8” LEVELER LINK

1”N FLAT WASHER
1 X 7-7/8

LEVELER PIN
FLANGE BEARING
13” LEVELER

LINK

5/16 X 2-1/2
SPRING
SLOTTED PIN

CENTER
LEFT LIFT

LEVELER L LINK
3/4-10 HEX LOCK

NUT

1-8 HEX
LOCK NUT

STEEL
BUSHING

LEVELER BALL
JOINT LINK

HE

HEAD CAP SCREW
1-8 X 4-1/2 HEX

HEAD CAP SCREW
1-8 X 4 HEX

HEAD CAP SCREW
1-8 X 4-1/2 HEX

HEAD CAP SCREW

3/4-10 X 3-1/2 X

LEVELER SCREW
ASSEMBLY

ASSEMBLED VIEW FROM REAR OF MACHIINE

3-4 F-561-0113 Edition

Figure 3-2: Leveler Assembly Installation

Leveler Assembly

NOTE

ASSEMBLY INSTRUCTIONS

1. Install a hardened steel wear bushing in the leveler L
link (See Figure 3-2.)

2. Attach the leveler L link to the front mount of the
center frame with a 1-8 x 4-1/2 hex head cap screw
and hex lock nut.

3. With a 1-8 x 4 hex head cap screw and hex lock nut
attach the leveler ball joint link to the leveler L link.

4. Connect the bottom end of the leveler ball joint link to
the rear mounting holes of the hitch using a 1-8 x
4-1/2 hex head cap screw and hex lock nut.

When the hitch is in the upper mounting position, the
leveler ball joint link is mounted in the lower holes. When
the hitch is in the lower position, the link is mounted in the
top mounting holes. See Section 4, “Hitch Adjustment”
for proper adjustment.

5. Slide one end of the 13” link over the leveler screw
assembly. Slide the large end of the 8” link over the
other link and secure with a 1” flat washer and 5/16”
x 2-1/2 spring slotted pin. Repeat this for the other
side of the leveler screw assembly.

6. Attach the bottom end of the 8” leveler links to cen ter
frame mount located in the middle of the frame using
1" x 7-7/8” leveler pin, washers, and 5/16” x 2-1/2 ”
spring slotted pins.

7. Secure the rear of the 13” leveler links in the third
hole down from the top of the mounting plates
located on the center lift using 1" x 7-7/8” leveler pin,
washers, and 5/16” x 2-1/2” spring slotted pins.

3-5

ASSEMBLY INSTRUCTIONS

manual leveler assembly

1/4 ZERK FITTING
LEVELER TUBE
5/8-11 HEX LOCK NUT

LEVELER
HANDLE

LEVELER
CROSS

1-1/2 FLANGE
BEARING

1-1/2 FLAT
WASHER

5/8-11 X 3-1/2 HEX HEAD CAP SCREW

5/16 X 2-1/2 SPRING SLOTTED PIN

1N FLAT WASHER
LEVELER CROSS BRACKET
3/4-10 X 3-1/2 HEX HEAD

CAP SCREW

1-8 X 4 HEX HEAD
CAP SCREW

FLANGE BEARING

LEVELER L LINK

-1/2

STEEL BUSHING
1-8 X 4 HEX HEAD

CAP SCREW

LEVELER

SCREW ASSEMBLY

3/4-10 HEX
LOCK NUT

1-8 HEX
LOCK NUT

LEVELER LINK
BALL JOINT

ASSEMBLED VIEW FROM REAR OF MACHIINE

3-6 F-561-0113 Edition

Figure 3-3: Manual Leveler Installation