Hydraulic cylinder seal kits are used to seal the gap between different parts of the hydraulic cylinder. The function of hydraulic cylinder seal kits is to prevent oil leakage, to assure the working pressure of the hydraulic system, to maintain its power.
Boom Cylinder seal kit is, as the name suggests, fitted into the boom cylinder.
There are regularly three cylinders for the excavator, boom cylinder, arm cylinder, bucket cylinder.
Arm cylinder is the top one, and it's usually be called as top cylinder;
The bucket cylinder is the one that connects and controls the bucket.
Boom cylinder is the one (or the two) near the cabin. Usually, there is one piece boom cylinder for the small excavator under 10-tun; the bigger excavator's two pieces boom cylinders. But there is an exception too when the driver will remove one piece for a special purpose, say at some particular working place, it is convenient to work by one cylinder. Soft remind: all refit job should be operated by an experienced technician.

The seals in the cylinder seal kit are of two kinds seals.
One call dynamic seals; the other is static seals.

Dynamic seals are designed to be utilized in high pressure and even when rod and hydraulic cylinder seals are in reciprocal motion between the head and the connecting rod. They are to seal various parts in relative motion.

Static seals are the ones used in various loions that not in relative motion, as per the construction and look of the hydraulic cylinder. The primary area where these seals used are the connection rod and piston.

Every type of dynamic seals has its function.

Engine Parts

cylinder block, cylinder head, piston liner kits, fuel injection pump, crankshaft, camshaft, water pump, oil pump, fuel pump assy, turbocharger, connecting rod, gasket kit, main &con rod bearings, valves, plunger/delivery valve/nozzle, oil cooler assy and so on.

Hydraulic Parts

hydraulic pump assy, hydraulic pump spare parts (cylinder block, valve plate, retainer plate, guide ball, shoe plate, piston shoe, shaft drive, friction plate, separation plate,ect. ) swing motor assy, travel motor assy, main control valve, gear pump, center joint, bucket cylinder, boom cylinder , arm cylinder and so on.

Seal Parts

travel motor seal kit, swing motor seal kit, main pump sel kit, shaft seal, breaker seal kit, bulldozer seal kit, cylinder head seal, crankshaft seal, piston seal, floating oil seal, DU bushing, O-ring box kit, arm/bucket/boom cylinder seal kit and so on.

Undercarriage Parts

carrier roller, track roller, idler, sprocket, track link, track shoe, muffer, bucket , bucket teeth, oil cylinder parts and so on .

Cooling System

air condition condenser, small water tank heater, cooling radiator, water tank, thermostat, oil cooler assy, oil cooler cover and so on.

Electronic Parts

starter motor, alternator, step motor, governor motor, sensor, pressure swich, solenoid valve, fuel tank floating, stop solenoid, ignition switch, monitor and so on.

Filter

oil filter, fuel filter, hydraulic filter, oil water seperator, oil water seperator cap&filter, stainer, drier, expansion valve, air conditioner filter and so on.