242Service Manual – Advance 7765 / Nilfisk CR1500Wheel System, Non-tractionFunctional DescriptionThe non-traction wheel system supports the front of the machine and includes the braking system.Five 1/2”-20 x 1.56 Studsand 1/2”-20 Lug Nuts fastenthe Molded Wheels to theFront Wheel Hubs. Five1/4”-20 screws fasten theBrake Discs to the FrontWheel Hubs.A Slotted Hex Nut andcotter pin hold the FrontWheel Hubs and attachedMolded Wheels and BrakeDiscs, and the associatedroller bearings andwashers onto the Stub AxleWeldments.The brake rods actuatethe Brake Caliper AssemblyWeldments which compressthe brake pads againstthe Brake Discs to stop themachine. Four 1/2”-20 x1.0 HHC Screws fasten theStub Axle Weldments to themachine frame.Brake CaliperAssemblyWeldmentStub AxleWeldmentBrake CaliperAssemblyWeldmentBrakeDisc FrontWheelHubSlottedHex NutMoldedWheel1/2”-20Lug Nut1/2”-20 x1.56 Stud1/2”-20 x1.0 HHCScrew
