Reyco Granning IFS1700S User manual

Motorhome Suspensions
IFS1700S
Owner’s Manual
Reyco Granning Suspensions
1205 Industrial Park Drive
Mount Vernon, MO 65712
Phone: [phone]
Fax: [phone]
1-800-753-0050
w w w. r e y c o g r a nning . c o m
Revision Date: 9/14
Document #: D711987
Revision: C
| Independent Front Suspension
Service Parts
Maintenance Instructions

Table of Contents
D711987 1 IFS1700S
Introduction .................................................................4
Service Notes.....................................................................................................4
Identification......................................................................................................5
Vehicle Towing Information .............................................................................6
Maintenance Schedule.......................................................................................7
Parts Lists ....................................................................9
Unit Assembly...................................................................................................9
Control Arm Components ...............................................................................10
Control Arm Assemblies .................................................................................11
Steering Components ......................................................................................12
Air Spring and Shock Components.................................................................14
Height Control Components............................................................................15
Sway Bar Components (-SB Models Only) ....................................................16
Disc Brake Components..................................................................................17
King Pin Components .....................................................................................18
Steering Knuckle Carrier Components ...........................................................19
Lubrication ................................................................20
Lubricant Specifications and Intervals............................................................20
General Lubrication.........................................................................................20
Ball Joints ........................................................................................................20
Rod Ends on Tie Rods Crank Rod ..................................................................21
Carrier Bearing and Kingpin ...........................................................................21
Wheel Bearings ...............................................................................................22
Troubleshooting.........................................................23
Inspection ...................................................................27
General Inspection...........................................................................................27
Inspecting the Control Arm Bushings for Wear .............................................27
Inspecting the Tie Rod Ends ...........................................................................28
Inspecting the Brake System ...........................................................................28
Brake System .................................................................................................................. 28
Inspecting the ABS Sensor and Tone Ring.....................................................29
Inspecting the Shock Absorber .......................................................................29
Inspecting the Air Spring and Height Control Valve......................................30
Air Spring Inspection...................................................................................................... 30
Height Control Valve Inspection .................................................................................... 30
Inspecting the Idler Arm & Crank Arm Bearings...........................................30
Inspecting the Relay Rod Ball Joints ..............................................................31

Table of Contents
D711987 2 IFS1700S
Seal Inspection ................................................................................................................ 31
Endplay Inspection.......................................................................................................... 31
Inspecting Wheel Bearing Endplay.................................................................31
Inspecting the Knuckle Carrier Bearing and Seal ...........................................32
Inspecting the Kingpin Vertical Endplay........................................................32
Adjustments ...............................................................33
Adjusting Wheel End Play ..............................................................................33
Adjusting Suspension Ride Height .................................................................35
Adjusting the Maximum Wheel Turn Angle ..................................................36
Inspection before Alignment...........................................................................37
Wheels and Tires............................................................................................................. 37
Front Suspension............................................................................................................. 37
Rear Axle and Suspension .............................................................................................. 38
Front Wheel Alignment...................................................................................38
Equipment....................................................................................................................... 38
General............................................................................................................................ 38
Preparation ...................................................................................................................... 39
Adjusting the Camber Angle...........................................................................40
Eccentric Camber Adjustment ........................................................................................ 40
Bar Pin Camber Adjustment ........................................................................................... 42
Adjusting the Caster Angle .............................................................................42
Eccentric Caster Adjustment........................................................................................... 43
Adjusting the Toe-In .......................................................................................44
Repair .........................................................................46
General Procedures..........................................................................................46
Cleaning the Parts............................................................................................46
Ground or Polished Parts ................................................................................................ 46
Rough Parts..................................................................................................................... 47
Drying ............................................................................................................................. 47
Preventing Corrosion ...................................................................................................... 47
Replacing Tie Rod Ends..................................................................................47
Removal .......................................................................................................................... 47
Installation....................................................................................................................... 47
Replacing the Relay Rod Ball Joints...............................................................48
Removal .......................................................................................................................... 48
Installation....................................................................................................................... 48
Replacing the Bell Crank, Idler Arm, and Crank Arm Bearings ....................48
Removal .......................................................................................................................... 49
Installation....................................................................................................................... 49
Replacing the Upper and Lower Control Arm Bushings ................................49
Upper Control Arm Removal.......................................................................................... 50
Upper Control Arm Installation ...................................................................................... 50

Table of Contents
D711987 3 IFS1700S
Lower Control Arm Removal ......................................................................................... 50
Lower Control Arm Installation...................................................................................... 51
Replacing Wheel Bearings, Oil Seals, and Hub Caps.....................................51
Removal .......................................................................................................................... 52
Installation....................................................................................................................... 53
Replacing Brake Components.........................................................................55
Brake Rotors ................................................................................................................... 55
Brake Chambers.............................................................................................................. 55
Other Brake Components................................................................................................ 55
Replacing the ABS Sensor and Tone Ring .....................................................55
Sensor Removal .............................................................................................................. 55
Sensor Installation........................................................................................................... 55
Tone Ring Removal and Installation .............................................................................. 56
Replacing the Shock Absorber........................................................................56
Removal .......................................................................................................................... 56
Installation....................................................................................................................... 56
Replacing the Air Spring.................................................................................56
Removal .......................................................................................................................... 56
Installation....................................................................................................................... 56
Replacing the Height Control Valve ...............................................................57
Removal .......................................................................................................................... 57
Installation....................................................................................................................... 57
Replacing the Sway Bar and Components ......................................................57
Vertical Linkage Removal .............................................................................................. 57
Vertical Linkage Installation........................................................................................... 57
Sway Bar Removal ......................................................................................................... 57
Sway Bar Installation...................................................................................................... 57
Replacing the Steering Knuckle Carrier Bearings ..........................................58
Removal .......................................................................................................................... 58
Installation....................................................................................................................... 59
Torque Tables............................................................61

Introduction
D711987 4 IFS1700S
Introduction
Service Notes
This Service Manual describes the correct service and repair procedures for the
Reyco Granning
®IFS1700S Independent Front Suspension model with 17,000 lbs Gross
Axle Weight Rating (GAWR). Overloading the suspension may result in adverse ride and
handling characteristics.
You must read and understand all procedures and safety precautions presented in this manual
before conducting any service work on the suspension.
Proper tools must be used to perform the maintenance and repair procedures in this manual.
Some procedures require the use of special tools for safe and correct service. Failure to use
the proper and/or special tools when required can cause personal injury and/or damage to
suspension components.
You must follow your company safety procedures and use proper safety equipment when you
service or repair the suspension.
The information contained in this manual was current at the time of printing and is subject to
change without notice or liability.
Reyco Granning
®reserves the right to modify the
suspension and/or procedures and to change specifications at any time without notice and
without incurring obligation.
Reyco Granning
®uses the following types of notices for potential safety problems and to
give information that will prevent damage to equipment.
WARNING
A warning indicates procedures that must be followed exactly. Serious personal
injury can occur if the procedure is not followed.
CAUTION
A caution indicates procedures that must be followed exactly. Damage to equipment
or suspension components and personal injury can occur if the procedure is not
followed.
NOTE
A note indicates an operation, procedure or instruction that is important for correct
service.

D711987 5 IFS1700S
Identification
The suspension model and serial number are stamped on an aluminum tag that is riveted to
the front of the suspension sub-frame assembly (Figure 1). The serial number is used by
Reyco Granning
®for control purposes and should be referred to when servicing the
suspension or requesting technical support (Figure 2).
Figure 1 - Suspension Identification Location
Figure 2 - Suspension Serial Number Tag
Model
GAWR
(lb)
Wheel
Cut
Disc
Brakes
Sway
Bar
Height Control
IFS1700S
17,000 55° Bendix
ADB22X
No
Valve
Dual
IFS1700S-SB
Yes
Single
IFS1700S-SHC
No
Electronic
Sensor
Dual
IFS1700S-SHCSB
Yes
Single
Table 1 - Model Identification

D711987 6 IFS1700S
Vehicle Towing Information
If a vehicle is disabled and needs to be towed by the front end to service center, check the
OEM/Coach Builder towing procedures for the recommended method. Check with local
authorities and Department of Transportation (DOT) for permissible towing methods before
towing. Some states do not permit towing by chains and/or straps.
The preferred towing apparatus is the type that cradles the front tires. If the towing apparatus
cannot be attached to the front tires or directly to the chassis frame rails, then the suspension
sub-frame may be used for attachment.
WARNING
Attaching towing equipment to improper locations and failure to utilize OEM/Coach
Builder recommended towing methods could result in one or more of the following:
··Loss of vehicle control.
··Possible disconnection from tow vehicle.
··Damage to the suspension and/or vehicle.
Do Not attach tow apparatus (hooks, chains, straps, etc.) to suspension upper and lower
control arms, sway bar and brackets, brake components, tie rods, steering arm assemblies, or
steering knuckle carrier assemblies (Figure 3).
Figure 3 –Improper Tow Equipment Attachment Locations

D711987 7 IFS1700S
Maintenance Schedule
GENERAL
MAINTENANCE SERVICE TO BE PERFORMED MILEAGE IN THOUSANDS
12 24 36 48 60 72 84 96
Steering Arm Assembly Ball
Joints
Check axial endplay X X
2
Inspect for ruptured seals X X X X X X X X
2
Check thatcotter pin is installed X X X X X X X X
2
Control Arm Bushings Check bolt torque X X
2
Inspect for control arm and mount contact X X X X X X X X
2
Inspect for bushing wear
X
X
X
X
X
X
X
X2
Tie Rod Ends
Inspect ball socket endplay
X
X
X
X
X
X
X
X2
Check for taperconnection looseness
X
X
X
X
X
X
X
X2
Check cotter pin installation X X X X X X X X
2
Brake System Inspect Brake Pads for excessive or uneven wear X X X X
2
Inspect Brake Caliper for minimum free play X X X X
2
Inspect for Air Leaks using soapy water solution X
Air Springs Inspect for proper clearance (1” minimum all around)X
Check upper mount nut and lower mount bolt torque X
Inspect for signs of chafing or wear X X X X X X X X
2
Inspect for air leaks using soapy water solution X
Height Control Valve and
Linkage
Inspect for signs of bending, binding, or slippage X X X X X X X X
2
Inspect for air leaks using soapy water solution X
Shock Absorbers Check mounting nut torque X
Inspect shocks for signs of fluid leak, broken eye
ends, loose fasteners, or worn bushings
X X X X X X X X
2
Kingpins Check for wear X X
2
Inspect vertical endplay X X
2
Steering Arm Assembly
Bearings
Check Mounting Nut torque X X
2
Inspect bearings for excessive radial play X X X X X X X X
2
Carrier Bearings Check axial endplay X
2
Wheels Check Wheel Bearing endplay X X
2
Check Wheel Nut torque
1
X X X X X X X X
2
Front Alignment Inspect toe-in
3
X X X X
2
Air Fittings and Air Lines Inspect for air leaks using soapy water solution X
Inspect for signs of chafing, cracking, or wear X X X X X X X X
2
Sway Bar Bushings
Check mounting bolt torque
X
X2
Inspect for bushing wear X X X X X X X X2
1. Wheel Nuts must be re-tightened to propertorque specifications as per the vehicle or chassis manufacturer’s Owner Guide
2. Continue to perform specified maintenance every 12,000 miles or at previous interval
3. Final stage manufacturer should complete toe-in inspection and adjustment after completion of vehicle

D711987 8 IFS1700S
Maintenance Record
Name of Owner: Address of Owner:
Date of Purchase: Name and Address of Dealer:
Model of Vehicle: Vehicle Identification Number:
Suspension Model Number:
IFS1700S; IFS1700S-SB;
IFS1700S-SHC;
IFS1700S-SHCSB
Suspension Serial Number:
Inspection and Maintenance Item Date Mileage Service Performed