71-10 Engine (continued)
B. Installation
1. Prepare engine for installation in helicopter per Section 71-12, as required.
2. Refer to Figures 71-1 and 71-2. Connect engine hoist to G200-1 engine lifting lug.
3. Remove F579-1 bellmouth cover. Carefully install engine, inserting bellmouth through
firewall. Do not pinch loose wires or cables, or damage fittings or line assemblies. Before
installing engine mounting hardware, verify the inlet seal is centered when pressed
against the firewall, and that the seal is not twisted or pinched.
4. Install hardware securing side engine mounts to F046 frames. Standard torque bolts
(one per side) per Section 20-32; install 0.032-inch diameter lockwire and safety bolts
to frames. Install hardware securing bottom engine mount to F714-1 support weldment.
Special torque bolts per Section 20-33; install 0.032-inch diameter lockwire and safety
three bolts together. Remove engine hoist.
5. Install exhaust per Section 71-30.
6. Refer to Figure 63-1. Install hardware securing F018-1 clutch assembly yoke to (aft)
A947-2 plate assembly, as removed. Perform engine driveline shimming per Section
63-11. Standard torque nuts and palnuts per Section 20-32, and torque stripe per
Figure 5-1. Verify 0.2 inch minimum clearance between shaft weldment and firewall
grommet; verify equal gap concentrically between shaft and box assembly hole edges.
Adjust F174-1 support weldment rod ends per Section 53-31 as required.
7. Remove cap and torque check engine compressor (customer air) union per RR300
Operation and Maintenance Manual (OMM). Remove plug and connect G391-1 line
assembly B-nut to engine. Special torque B-nuts per Section 20-33 and torque stripe
fittings. Install hardware securing line assembly clamps.
8. Refer to Figure 79-2. Remove caps and torque check engine (oil line) fittings per RR300
OMM. Remove plugs and connect F723-1, F723-2, and F723-3 line assembly B-nuts to
engine. Special torque B-nuts at engine, F649-1 oil cooler, and G689-1 oil tank assembly
per Section 20-33, and torque stripe fittings. Install hardware securing line assembly
clamps. Service engine oil per RR300 OMM; service engine oil per Section 12-60.
9. Remove cover and tape and install B277-32 clamps and A785-37 hose onto inducer
bleed port and G918-1 box assembly; tighten clamps. Install MS21919WDG36 clamp
around hose, and install hardware securing clamp and hose to firewall. Verify security.
10. Remove cap and torque check engine fuel inlet fitting per RR300 OMM. Remove plug
and connect B283-12 (fuel) hose assembly B-nut to inlet fitting. Special torque B-nut
per Section 20-33 and torque stripe per Figure 5-1. Push fuel shut off valve ON.
11. Connect F059-01 (cabin) electrical harness plug to N2 speed sensor; connect cabin
harness "TMP" (torquemeter oil pressure) and "MOP" (main oil pressure) plugs to
engine sensors. Connect cabin harness to F049-02 (engine) harness at F577-1 bracket
assembly. Install wires and cables on starter-generator studs according to stamping.
Install hardware, special torque nuts, and torque stripe per Figure 5-1.
12. Perform FCU throttle and fuel cutoff control rigging per Sections 76-11 and 76-12. Perform
PTG control rigging per Section 76-21 (perform PTG rigging check during run-up).
13. Install engine EMU per Section 71-60, as required.
14. Perform ground check per Section 5-41. Remove the air from the engine fuel system,
then perform fuel flow check, per RR300 OMM. Perform run-up per Section 5-42, and
PTG rigging check per Section 76-22.
15. Install engine cowling assembly per Section 53-21.
SEP 2012 R66 Maintenance Manual Chapter 71 Powerplant Page 71.5
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