A PowrTwin Plus 6900 has a gas engine driving a hydraulic motor, which strokes a piston fluid section. Packings, valve balls and seats wear first, in the fluid section. The motor, hydraulic system, filter and bleed valve each have their own diagram page on AllTitanParts, so you can order by callout number.
How the 6900 Plus is put together
Every PowrTwin is a hydraulic-drive piston airless sprayer. The engine (on a gas 6900 Plus, a Honda GX160 per Titan) drives a hydraulic pump, the hydraulic motor strokes the piston, and the piston fluid section pushes paint to the gun. The 6900 Plus supports up to four guns. Each link in that chain has its own diagram on our site, which makes ordering simple: find the assembly that matches your symptom, then order by callout number.
Titan describes the drive as slow-stroking, and its manuals say the up and down strokes should take about the same time. A stroke that is faster in one direction is the best early warning you have that something in the fluid section is wearing.
Specs for the 6900 Plus (flow and maximum pressure in particular) differ between Titan's web pages and its older owner's manuals, so this guide leaves them out. Check the manual for your sprayer on our manuals page.
Fluid section: where most wear happens
The fluid section is the pump end that actually moves paint, so it takes the abrasion. The PowrTwin Plus 6900 Fluid Section diagram lists the parts below.
Fluid section parts that matter
The same diagram also lists the upper and lower packing springs (142-004 and 142-003), the retaining ring (143-019), the connecting pin (143-120), the outlet valve housing (236-031A), the seal washer (236-032) and the foot valve cage (236-141). If you are replacing several of these at once, look at the service kits before ordering them one by one.
Service kits: what is bundled
Titan's manual for the 6900 DI Plus describes a minor fluid section kit (144-050) holding the retaining ring, PTFE O-rings, packing sets, valve balls, seat O-ring and seal washer, and a major kit (143-500) that adds the displacement rod and pump cylinder. Confirm on the diagram for your own sprayer that a kit covers the parts you need before you order.
Titan sets routine fluid section service at about 1,000 hours of use, and sooner if the top packing leaks or one stroke becomes faster than the other. Titan says never to substitute oil, water or solvent for its piston lube (314-480) in the packing oil cup, and to fill that cup only half full.
Fluid section parts for the PowrTwin family, with live prices.
Hydraulic motor: the part that strokes the piston
The PowrTwin Plus 6900 Hydraulic Motor diagram is the busiest on the machine at 36 parts. The ones owners ask for most are the spool valve with sleeve (441-908), the piston seal (235-027), the rod seal (235-028), the trip spring (325-005) and the cylinder head plug (235-030).
Titan sells a minor hydraulic motor kit, 235-050. In the 6900 DI Plus manual it holds O-rings, trip springs and balls, the flex lock nut, the piston seal and the rod seal. The manual's troubleshooting table ties a motor that stalls to a sticking valve, a broken spring or valve rod assembly, or air in the motor or fluid pump, and low pressure with high heat to a blown piston seal, a cracked piston or blown spool valve O-rings.
Hydraulic system and control parts
The PowrTwin Plus 6900 Hydraulic System diagram has 45 parts. It covers the pressure control knob (448-243), the hydraulic filter (451-220), the dipstick (449-626) and the tank (449-718A).
- Titan calls Coolflo mandatory for the hydraulic system; 430-361 is the gallon and 430-362 the quart.
- Check the level on the dipstick at the Full mark each day.
- Change the fluid and the external hydraulic filter every twelve months, then run at low pressure for at least 5 minutes to purge air.
- Titan says the hydraulic pump itself is not field-serviceable.
- For the fill quantity, see your manual; Titan's own documents give different figures.
The pressure control knob sets the working pressure. Titan says to set pressure only as high as you need to atomise: extra pressure wears tips and adds overspray.
Filter and bleed valve
Two small assemblies cause a lot of low-pressure complaints. The High Pressure Filter diagram lists three manifold filter meshes: 930-006 (50 mesh, the standard insert for latex and normal architectural coatings), 930-007 (100 mesh for stains, lacquers and fine material) and 930-005 (5 mesh for heavy materials). Clean it regularly; Titan says it filters from the inside out. Titan replaces the spring (930-020) if it is shorter than 3/4 inch uncompressed and the carbide seat (180-909) if it is nicked. The PTFE gaskets, O-ring and spring come in the Filter Service Kit 930-050.
The Bleed Valve Assembly is the other. A worn bleed valve is on Titan's list of causes for a pump that cycles slowly with the gun off. The diagram lists the valve stem (944-011), the outlet valve ball (9841502), the seat (0294516), the seal (0294499) and a service kit, 944-050.
Engine side, belt and siphon hose
On the Main Assembly diagram you will find two V-belts: 449-125 (A-40) and 449-181 (A-38, listed as 120V). Choose by your sprayer's power version and confirm on the diagram. Titan's manual says the belt is changed after pressure relief by opening the belt guard and lifting the front of the engine or motor to release the tension; follow the manual for the procedure.
The Gas Convertokit diagram shows the engine (980-331A), mounting plate, pulley and vibration pads. On the intake side, the Siphon Hose Assembly includes the inlet screen (0509762A), which Titan says to clean at least once a day. The manual also warns that siphon hose threads must be taped and sealed, because air leaks cause erratic operation.
Ordering the right part
Name the symptom
Leaking at the oil cup or one fast stroke: fluid section. Stalling, or low pressure with heat: hydraulic motor. Low pressure at the gun: tip, gun filter and manifold filter first.
Open the matching diagram
Use the links above and match the numbered callout on the drawing to the part list.
Confirm your model
Some part numbers appear under the older 5500, XLT and DI diagrams as well. Cross-check against your manual and serial number.
Relieve pressure first
Follow the pressure relief procedure in your manual before opening any assembly.
Packings, balls, seats, rod and cylinder
Spool valve, seals, springs and head plug
Tank, filter, dipstick and pressure knob
Coolflo, piston lube, filters, gun and manifold
The short version
Start with the fluid section, since its packings, balls and seats take the wear. Check the cheap items first, use only Coolflo on the hydraulic side and piston lube only in the packing cup, and order from the diagram for your exact model. If fitment is unclear, call (713) 931-0006 with your model and serial number.
Not sure which 6900 part you need?
Open the diagram for the assembly, or call (713) 931-0006 with your model and serial number.
(713) 931-0006Order by Parts Diagram