TANK - S HYDRAULIC DRIVE & STEERING SYSTEM Model Year 2009
TANK - S HYDRAULIC DRIVE & STEERING SYSTEM TABLE OF CONTENTS: PAGE 2 ) ……………………………….. Table of Contents. PAGE 3 ) ……………………………….. System Overview. Major Components. Part Numbers. Hydraulic Fluid Specifications. Capacities. Hydraulic Oil / Fluid: Factory Spec. Hydraulic Oil / Fluid: Alternative. Filter Element: PAGE 4 ) ………………………………… Maintenance Schedule. Daily. First 50 Hrs. Every 100 Hrs. Every 500 Hrs. PAGE 5 ) …………………………………. Troubleshooting Checklist. Unit Does not Track or Drive Straight.
SYSTEM OVERVIEW: The steering system incorporated on the TANK-S Unit is a system that coordinates the steer angle of the front wheels and the speed of the rear wheels when negotiating a turn. The front steering assembly is connected to the drive wheel hydraulic pumps by a coordinated linkage system. As the front wheels are turned in a direction, the speeds of the rear wheels are synchronized to match the exact speed required for the turn created by the steer angle of the front wheels.
Daily: (Highly Recommended) Check the Hydraulic Oil Level in the reservoir. Low fluid level will enable the pumps to ingest air into the system or cause the system to run at temperatures above recommended levels. Both conditions will damage pumps and motors. High fluid level can cause the oil to leak by the filler cap or breather when the fluid expands during operation. Normally, this does not result in component damage.
TROUBLE SHOOTING CHECKLIST Possible Cause Corrective Action UNIT DOES NOT DRIVE/TRACK STRAIGHT Tires improperly inflated………………………………………. Refer to units’ manufacturer suggested pressure. Control linkage bent, loose or out of adjustment…………… Repair, adjust or replace drive linkage. Bypass loose…………………………………………………… Tighten pump bypass valve. Inlet Leak……………………………………………………….. Check all external lines and connections to pump inlet.
SAFETY PRECAUTIONS AND WARNINGS: Always Wear Proper Protective Clothing and Eye Protection When Performing Service or Maintenance Procedures. Spilled or Leaking Hydraulic Oil / Fluid Causes Slippery Surfaces as Floors and Tools. Keep Areas and Surfaces Clean. Use Extreme Caution When Working With High Temperature and High Pressure Systems. PERFORMING SERVICE or MAINTENANCE w/ ENGINE NOT RUNNING: 1. Apply Parking Brake. 2. Remove Key From Ignition. 3. Disconnect Spark Plug Wires. 4. Disconnect Battery. 5.
Hydraulic Steering & Deck Lift Routing Schematic.
MAINTANCE AND SERVICE PROCEDURES: REPLACING THE FILTER: Park the unit on a flat level surface. Apply the brake. Remove the ignition key. Disconnect the battery. Disconnect the spark plug wires. If the unit has been running, allow engine and hydro system to cool sufficiently. Clean the area around the fill cap and filter assembly. Carefully, remove the three screws (3/8” wrench) securing the cap on the filter housing. See Fig.1. Cap Mounting Screws, (3).
DRAINING THE RESERVOIR HYDRAULIC OIL: Park the unit on a flat level surface. Apply the brake. Remove the ignition key. Disconnect the battery. Disconnect the spark plug wires. If the unit has been running, allow engine and hydro system to cool sufficiently. Clean the area around the fill cap, filter assembly and bottom surface of the reservoir tank. Lower the deck to the lowest position. Place a 1 gal. shallow pan under the reservoir.
SERVICE TIPS & HINTS: O-Ring Seals: When loosening or disassembling hoses and fittings the O-Rings can be damaged or misplaced. It is recommended that O-Ring Seals used in hose couplers and fittings be replaced when attempting to reuse components. If this isn’t feasible, always thoroughly inspect the O-Rings for cuts, distortion and brittleness. Over tightening can cause misalignment, deformation or cut the seals.
