Stimmen - 3, Durchschnittliche Bewertung: 4.3 ( )

Hersteller: Allied Telesis Dateigröße: 1.62 mb Dateiname: Unterrichtssprache:

Loose connections. Worn or damaged O-ring wiper seal in cylinder rod end. Worn or damaged O-rings in valve. Replace damaged parts. Tighten fittings. Install a seal repair kit. Install an O-ring repair kit. Insufficient lift capacity Improper hydraulic pump operation. Repair or replace pump. Load is greater than boom lift capacity. Check loader specifications. Internal boom cylinder leakage. Replace any worn parts and install a seal repair kit. Improper hydraulic valve operation. Repair or replace valve. Slow leakdown. Worn control valve. Worn cylinder piston seals. Have authorized dealer replace seals. Have authorized dealer replace seals. Excessive wear on bottom oil bucket and wear pads. t Float position not used while operating Use float position provided on valve, loader. Hydraulic cylinders inoperative. Hose from control valve improperly connected. Refer to plumbing diagrams. Pump operating continually on closed Tractor control valve relief stuck center tractor hydraulic system. open. Hydraulic control valve set too low. See your tractor manual for proper adjustment or Loader dealer for loader valve. (3000 PSI is maximum pressure relief setting recommended.) Adjust valve in accordance with manual. Loader lift and bucket tilt controls do not work according to decal. Hoses improperly connected. Refer to plumbing diagrams and correct hose connections. Valve noisy and/or hot Open center control valve on closed center tractor. Replace relief valve with closed center plug and plug the power beyond adapter on valve Tractor loads/pump squeals Closed center control valve on open Install open center plug on optional valve. center tractor. Replace closed center plug with relief and install short plug in place of power beyond adapter. 18 General Notes and Instructions to the Operator Regarding ALLIED HSL Loader Operations 1. The hydraulic self-leveling system (HSL) utilizes two metering cylinders which displace oil into or out of the bucket cylinders as the loader is raised or lowered. The cylinder volumes and geometries are carefully matched for each loader model to provide the correct amount of oil to keep the bucket level after it is initially leveled. 2. The HSL system incorporates two relief valves which are only utilized if the bucket cylinders are at either end of the stroke. If the loader is raised with the bucket fully dumped, oil will be bypassed at high pressure into the lower side of the lift cylinder circuit. If the loader is lowered with the bucket fully rolled back, oil will be bypassed at high pressure into the raised side of the lift cylinder circuit. Note that these two conditions are likely to occur only intermittently, and although the pump will be forced to supply oil at a higher pressure no damage to the loader components will occur. It is, however, recommended to avoid the above situations and keep the bucket somewhat level while raising or lowering the loader for smoother operation. 3. Note that the large volume (piston side) of the leveling cylinders is connected to the large volume of the bucket cylinders, and the small volume (rod side) is connected between the two sets of cylinders. The effect of this configuration is to create a breakout force "boost" if the bucket cylinders are pressurized towards the rollback position during breakout. 4. The opposite effect of the above situation is that the loader will have poor lift capacity if lifting with the bucket cylinders pressurized in the dumped position. Jhis is, however, a very unlikely occurrence (lifting a load with bucket fully dumped). 5. The cartridge style relief valves are factory set at 2,000 psi cracking pressure and are capable of bypassing 15-20 GPM. If loader lock-up should occur due to a low tractor relief setting, higher inlet flows or return line restrictions, the relief valve setting may be backed off slightly until the lock-up condition is overcome (as described in note 2 above). 6. CAUTION: Never utilize the leveling cylinders to raise the loader. This could occur if the lift cylinders are placed in float while the bucket cylinders are held pressurized in the retracted position. If the loader should rise, k pressurize the lift cylinders to lower it; otherwise a rapid drop may occur when the bucket cylinders are extended. Note that this situation is unlikely to occur during normal loader operation and is possible only with a lightly loaded bucket. 19 General Notes and Instructions to the Operator Regarding ALLIED TSL Loader Operations The true self levelling system (TSL) utilizes mechanical linkages to maintain bucket level while raising and lowering. The pivot plate weldment, levelling tubes and linkages have been developed to ensure that the bucket remains at the same position throughout its range of motion. This feature is standard with 2.50” and 3.00” diameter bucket cylinders. The TSL system incorporates a relief and anticavitation manifold to provide extra dump at ground and rollback at fu...

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